1249999940 has 24 divisors (see below), whose sum is σ = 3000000192. Its totient is φ = 428571360.

The previous prime is 1249999903. The next prime is 1249999967. The reversal of 1249999940 is 499999421.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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, 4464146 + ... + 4464425.

It is an arithmetic number, because the mean of its divisors is an integer number (125000008).

Almost surely, 2^1249999940 is an apocalyptic number.

1249999940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1249999940 is an abundant number, since it is smaller than the sum of its proper divisors (1750000252).

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

1249999940 is a wasteful number, since it uses less digits than its factorization.

1249999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928587 (or 8928585 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 56.

The square root of 1249999940 is about 35355.3382107992. The cubic root of 1249999940 is about 1077.2173277805.

The spelling of 1249999940 in words is "one billion, two hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred forty".