1245555040 has 48 divisors (see below), whose sum is σ = 2965842432. Its totient is φ = 494290944.

The previous prime is 1245555011. The next prime is 1245555053. The reversal of 1245555040 is 405555421.

It is a junction number, because it is equal to n+sod(n) for n = 1245554993 and 1245555011.

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, 10329 + ... + 50968.

It is an arithmetic number, because the mean of its divisors is an integer number (61788384).

Almost surely, 2^1245555040 is an apocalyptic number.

1245555040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245555040 is an abundant number, since it is smaller than the sum of its proper divisors (1720287392).

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

1245555040 is a wasteful number, since it uses less digits than its factorization.

1245555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61439 (or 61431 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 1245555040 is about 35292.4218494566. The cubic root of 1245555040 is about 1075.9389784035.

The spelling of 1245555040 in words is "one billion, two hundred forty-five million, five hundred fifty-five thousand, forty".