8161572 has 24 divisors (see below), whose sum is σ = 19487776. Its totient is φ = 2657088.

The previous prime is 8161537. The next prime is 8161579. The reversal of 8161572 is 2751618.

It is a super-2 number, since 2×8161572² = 133222515022368, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8161579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7393 + ... + 8424.

Almost surely, 2^8161572 is an apocalyptic number.

It is an amenable number.

8161572 is an abundant number, since it is smaller than the sum of its proper divisors (11326204).

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

8161572 is a wasteful number, since it uses less digits than its factorization.

8161572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15867 (or 15865 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 8161572 is about 2856.8465132030. The cubic root of 8161572 is about 201.3374692755.

The spelling of 8161572 in words is "eight million, one hundred sixty-one thousand, five hundred seventy-two".