1245637632 has 88 divisors (see below), whose sum is σ = 3367429632. Its totient is φ = 409292800.

The previous prime is 1245637621. The next prime is 1245637727. The reversal of 1245637632 is 2367365421.

It is a super-2 number, since 2×1245637632² = 3103226220509134848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215257 + ... + 220967.

Almost surely, 2^1245637632 is an apocalyptic number.

1245637632 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 1245637632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683714816).

1245637632 is an abundant number, since it is smaller than the sum of its proper divisors (2121792000).

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

1245637632 is an equidigital number, since it uses as much as digits as its factorization.

1245637632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805 (or 5787 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The square root of 1245637632 is about 35293.5919396142. The cubic root of 1245637632 is about 1075.9627594985.

The spelling of 1245637632 in words is "one billion, two hundred forty-five million, six hundred thirty-seven thousand, six hundred thirty-two".