1387842625 has 32 divisors (see below), whose sum is σ = 1870202880. Its totient is φ = 1022155200.

The previous prime is 1387842619. The next prime is 1387842629. The reversal of 1387842625 is 5262487831.

It is a de Polignac number, because none of the positive numbers 2^k-1387842625 is a prime.

It is a super-2 number, since 2×1387842625² = 3852214303533781250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1387842629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 777484 + ... + 779266.

It is an arithmetic number, because the mean of its divisors is an integer number (58443840).

Almost surely, 2^1387842625 is an apocalyptic number.

It is an amenable number.

1387842625 is a deficient number, since it is larger than the sum of its proper divisors (482360255).

1387842625 is a wasteful number, since it uses less digits than its factorization.

1387842625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290 (or 2280 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 1387842625 is about 37253.7598773600. The cubic root of 1387842625 is about 1115.4413516827.

The spelling of 1387842625 in words is "one billion, three hundred eighty-seven million, eight hundred forty-two thousand, six hundred twenty-five".