1247445366 has 12 divisors (see below), whose sum is σ = 2495063772. Its totient is φ = 415786284.

The previous prime is 1247445359. The next prime is 1247445371. The reversal of 1247445366 is 6635447421.

It is a happy number.

It is a super-2 number, since 2×1247445366² = 3112239882309747912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79305 + ... + 93723.

It is an arithmetic number, because the mean of its divisors is an integer number (207921981).

Almost surely, 2^1247445366 is an apocalyptic number.

1247445366 is an abundant number, since it is smaller than the sum of its proper divisors (1247618406).

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

1247445366 is an frugal number, since it uses more digits than its factorization.

1247445366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28843 (or 14424 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 1247445366 is about 35319.1926011906. The cubic root of 1247445366 is about 1076.4830055823.

The spelling of 1247445366 in words is "one billion, two hundred forty-seven million, four hundred forty-five thousand, three hundred sixty-six".