1325249639 has 12 divisors (see below), whose sum is σ = 1622755800. Its totient is φ = 1076141808.

The previous prime is 1325249633. The next prime is 1325249693. The reversal of 1325249639 is 9369425231.

It is not a de Polignac number, because 1325249639 - 2⁸ = 1325249383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1325249639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325249633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 710804 + ... + 712665.

It is an arithmetic number, because the mean of its divisors is an integer number (135229650).

Almost surely, 2^1325249639 is an apocalyptic number.

1325249639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1325249639 is a deficient number, since it is larger than the sum of its proper divisors (297506161).

1325249639 is a wasteful number, since it uses less digits than its factorization.

1325249639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423502 (or 1423495 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 1325249639 is about 36403.9783402858. The cubic root of 1325249639 is about 1098.4135917111.

The spelling of 1325249639 in words is "one billion, three hundred twenty-five million, two hundred forty-nine thousand, six hundred thirty-nine".