1251322604 has 54 divisors (see below), whose sum is σ = 2706115356. Its totient is φ = 504712320.

The previous prime is 1251322603. The next prime is 1251322607. The reversal of 1251322604 is 4062231521.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1251322603) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45599 + ... + 67689.

Almost surely, 2^1251322604 is an apocalyptic number.

1251322604 is a gapful number since it is divisible by the number (14) 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 1251322604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353057678).

1251322604 is an abundant number, since it is smaller than the sum of its proper divisors (1454792752).

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

1251322604 is a wasteful number, since it uses less digits than its factorization.

1251322604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22143 (or 22117 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1251322604 is about 35374.0385593729. The cubic root of 1251322604 is about 1077.5971396212.

The spelling of 1251322604 in words is "one billion, two hundred fifty-one million, three hundred twenty-two thousand, six hundred four".