1055517420 has 96 divisors (see below), whose sum is σ = 3169152000. Its totient is φ = 261540864.

The previous prime is 1055517409. The next prime is 1055517433. The reversal of 1055517420 is 247155501.

It is a super-2 number, since 2×1055517420² = 2228234047846912800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74031 + ... + 87129.

It is an arithmetic number, because the mean of its divisors is an integer number (33012000).

Almost surely, 2^1055517420 is an apocalyptic number.

1055517420 is a gapful number since it is divisible by the number (10) 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 1055517420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1584576000).

1055517420 is an abundant number, since it is smaller than the sum of its proper divisors (2113634580).

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

1055517420 is a wasteful number, since it uses less digits than its factorization.

1055517420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13207 (or 13205 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 1055517420 is about 32488.7275835789. The cubic root of 1055517420 is about 1018.1735287523.

The spelling of 1055517420 in words is "one billion, fifty-five million, five hundred seventeen thousand, four hundred twenty".