1245062640 has 40 divisors (see below), whose sum is σ = 3859694928. Its totient is φ = 332016640.

The previous prime is 1245062639. The next prime is 1245062683. The reversal of 1245062640 is 462605421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1245062598 and 1245062607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2593641 + ... + 2594120.

Almost surely, 2^1245062640 is an apocalyptic number.

1245062640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245062640 is an abundant number, since it is smaller than the sum of its proper divisors (2614632288).

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

1245062640 is a wasteful number, since it uses less digits than its factorization.

1245062640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187777 (or 5187771 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1245062640 is about 35285.4451580251. The cubic root of 1245062640 is about 1075.7971775825.

The spelling of 1245062640 in words is "one billion, two hundred forty-five million, sixty-two thousand, six hundred forty".