1156500172 has 6 divisors (see below), whose sum is σ = 2023875308. Its totient is φ = 578250084.

The previous prime is 1156500143. The next prime is 1156500173. The reversal of 1156500172 is 2710056511.

It is a self number, because there is not a number n which added to its sum of digits gives 1156500172.

It is not an unprimeable number, because it can be changed into a prime (1156500173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144562518 + ... + 144562525.

Almost surely, 2^1156500172 is an apocalyptic number.

It is an amenable number.

1156500172 is a deficient number, since it is larger than the sum of its proper divisors (867375136).

1156500172 is a wasteful number, since it uses less digits than its factorization.

1156500172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289125047 (or 289125045 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 1156500172 is about 34007.3546751287. The cubic root of 1156500172 is about 1049.6598057394.

Adding to 1156500172 its reverse (2710056511), we get a palindrome (3866556683).

The spelling of 1156500172 in words is "one billion, one hundred fifty-six million, five hundred thousand, one hundred seventy-two".