1247790552 has 16 divisors (see below), whose sum is σ = 3119476440. Its totient is φ = 415930176.

The previous prime is 1247790541. The next prime is 1247790571. The reversal of 1247790552 is 2550977421.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25995613 + ... + 25995660.

Almost surely, 2^1247790552 is an apocalyptic number.

1247790552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1247790552 is an abundant number, since it is smaller than the sum of its proper divisors (1871685888).

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

1247790552 is a wasteful number, since it uses less digits than its factorization.

1247790552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51991282 (or 51991278 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 1247790552 is about 35324.0789264207. The cubic root of 1247790552 is about 1076.5822891805.

The spelling of 1247790552 in words is "one billion, two hundred forty-seven million, seven hundred ninety thousand, five hundred fifty-two".