1172889252 has 18 divisors (see below), whose sum is σ = 2964803478. Its totient is φ = 390963072.

The previous prime is 1172889197. The next prime is 1172889269. The reversal of 1172889252 is 2529882711.

1172889252 is a `hidden beast` number, since 117 + 288 + 9 + 252 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1009714176 + 163175076 = 31776^2 + 12774^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 1172889198 and 1172889207.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16290093 + ... + 16290164.

Almost surely, 2^1172889252 is an apocalyptic number.

1172889252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1172889252 is an abundant number, since it is smaller than the sum of its proper divisors (1791914226).

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

1172889252 is a wasteful number, since it uses less digits than its factorization.

1172889252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32580267 (or 32580262 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 1172889252 is about 34247.4707387276. The cubic root of 1172889252 is about 1054.5949050812.

The spelling of 1172889252 in words is "one billion, one hundred seventy-two million, eight hundred eighty-nine thousand, two hundred fifty-two".