1249999425 has 24 divisors (see below), whose sum is σ = 2296296480. Its totient is φ = 666666000.

The previous prime is 1249999411. The next prime is 1249999447. The reversal of 1249999425 is 5249999421.

1249999425 is a `hidden beast` number, since 124 + 9 + 9 + 99 + 425 = 666.

It is not a de Polignac number, because 1249999425 - 2¹¹ = 1249997377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 925251 + ... + 926600.

It is an arithmetic number, because the mean of its divisors is an integer number (95679020).

Almost surely, 2^1249999425 is an apocalyptic number.

1249999425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1249999425 is a deficient number, since it is larger than the sum of its proper divisors (1046297055).

1249999425 is a wasteful number, since it uses less digits than its factorization.

1249999425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851870 (or 1851859 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 1249999425 is about 35355.3309275985. The cubic root of 1249999425 is about 1077.2171798426.

The spelling of 1249999425 in words is "one billion, two hundred forty-nine million, nine hundred ninety-nine thousand, four hundred twenty-five".