1157172 has 12 divisors (see below), whose sum is σ = 2700096. Its totient is φ = 385720.

The previous prime is 1157171. The next prime is 1157179. The reversal of 1157172 is 2717511.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157171) 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, 48204 + ... + 48227.

It is an arithmetic number, because the mean of its divisors is an integer number (225008).

2^1157172 is an apocalyptic number.

1157172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1157172 is an abundant number, since it is smaller than the sum of its proper divisors (1542924).

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

1157172 is a wasteful number, since it uses less digits than its factorization.

1157172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96438 (or 96436 counting only the distinct ones).

The product of its digits is 490, while the sum is 24.

The square root of 1157172 is about 1075.7192942399. The cubic root of 1157172 is about 104.9863020680.

The spelling of 1157172 in words is "one million, one hundred fifty-seven thousand, one hundred seventy-two".