1247099964 has 48 divisors (see below), whose sum is σ = 3234349440. Its totient is φ = 370776640.

The previous prime is 1247099939. The next prime is 1247099969. The reversal of 1247099964 is 4699907421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247099969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82134 + ... + 96125.

It is an arithmetic number, because the mean of its divisors is an integer number (67382280).

Almost surely, 2^1247099964 is an apocalyptic number.

It is an amenable number.

1247099964 is an abundant number, since it is smaller than the sum of its proper divisors (1987249476).

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

1247099964 is a wasteful number, since it uses less digits than its factorization.

1247099964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178330 (or 178328 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1247099964 is about 35314.3025416049. The cubic root of 1247099964 is about 1076.3836415230.

The spelling of 1247099964 in words is "one billion, two hundred forty-seven million, ninety-nine thousand, nine hundred sixty-four".