1072157172 has 12 divisors (see below), whose sum is σ = 2501700096. Its totient is φ = 357385720.

The previous prime is 1072157171. The next prime is 1072157197. The reversal of 1072157172 is 2717512701.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1072157172² = 2299042002942075168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072157171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44673204 + ... + 44673227.

It is an arithmetic number, because the mean of its divisors is an integer number (208475008).

Almost surely, 2^1072157172 is an apocalyptic number.

1072157172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1072157172 is an abundant number, since it is smaller than the sum of its proper divisors (1429542924).

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

1072157172 is a wasteful number, since it uses less digits than its factorization.

1072157172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89346438 (or 89346436 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 33.

The square root of 1072157172 is about 32743.8112015080. The cubic root of 1072157172 is about 1023.4960046785.

Adding to 1072157172 its reverse (2717512701), we get a palindrome (3789669873).

The spelling of 1072157172 in words is "one billion, seventy-two million, one hundred fifty-seven thousand, one hundred seventy-two".