1055420172 has 72 divisors (see below), whose sum is σ = 2827666800. Its totient is φ = 340424640.

The previous prime is 1055420167. The next prime is 1055420209. The reversal of 1055420172 is 2710245501.

1055420172 is a `hidden beast` number, since 105 + 542 + 0 + 17 + 2 = 666.

It is a super-2 number, since 2×1055420172² = 2227823478929019168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98704 + ... + 108872.

It is an arithmetic number, because the mean of its divisors is an integer number (39273150).

Almost surely, 2^1055420172 is an apocalyptic number.

1055420172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055420172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413833400).

1055420172 is an abundant number, since it is smaller than the sum of its proper divisors (1772246628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055420172 is a wasteful number, since it uses less digits than its factorization.

1055420172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10244 (or 10205 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1055420172 is about 32487.2309069271. The cubic root of 1055420172 is about 1018.1422586603.

Adding to 1055420172 its reverse (2710245501), we get a palindrome (3765665673).

The spelling of 1055420172 in words is "one billion, fifty-five million, four hundred twenty thousand, one hundred seventy-two".