1251026532 has 240 divisors, whose sum is σ = 4022016768. Its totient is φ = 330946560.

The previous prime is 1251026509. The next prime is 1251026533. The reversal of 1251026532 is 2356201521.

It is a happy number.

1251026532 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 0 + 2 + 653 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1251026496 and 1251026505.

It is not an unprimeable number, because it can be changed into a prime (1251026533) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2737248 + ... + 2737704.

Almost surely, 2^1251026532 is an apocalyptic number.

1251026532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251026532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011008384).

1251026532 is an abundant number, since it is smaller than the sum of its proper divisors (2770990236).

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

1251026532 is a wasteful number, since it uses less digits than its factorization.

1251026532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 557 counting only the distinct ones).

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

The square root of 1251026532 is about 35369.8534348108. The cubic root of 1251026532 is about 1077.5121438187.

The spelling of 1251026532 in words is "one billion, two hundred fifty-one million, twenty-six thousand, five hundred thirty-two".