1251132534 has 32 divisors (see below), whose sum is σ = 2869985280. Its totient is φ = 403590600.

The previous prime is 1251132521. The next prime is 1251132557. The reversal of 1251132534 is 4352311521.

1251132534 is a `hidden beast` number, since 12 + 5 + 113 + 2 + 534 = 666.

It is a super-2 number, since 2×1251132534² = 3130665235266522312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1251132498 and 1251132507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372022 + ... + 375369.

It is an arithmetic number, because the mean of its divisors is an integer number (89687040).

Almost surely, 2^1251132534 is an apocalyptic number.

1251132534 is an abundant number, since it is smaller than the sum of its proper divisors (1618852746).

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

1251132534 is a wasteful number, since it uses less digits than its factorization.

1251132534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747433 (or 747427 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1251132534 is about 35371.3518825617. The cubic root of 1251132534 is about 1077.5425762179.

The spelling of 1251132534 in words is "one billion, two hundred fifty-one million, one hundred thirty-two thousand, five hundred thirty-four".