1387561225 has 12 divisors (see below), whose sum is σ = 1723738384. Its totient is φ = 1108008720.

The previous prime is 1387561193. The next prime is 1387561243. The reversal of 1387561225 is 5221657831.

It is not a de Polignac number, because 1387561225 - 2⁵ = 1387561193 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37059 + ... + 64408.

Almost surely, 2^1387561225 is an apocalyptic number.

It is an amenable number.

1387561225 is a deficient number, since it is larger than the sum of its proper divisors (336177159).

1387561225 is a wasteful number, since it uses less digits than its factorization.

1387561225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102024 (or 102019 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 1387561225 is about 37249.9828859021. The cubic root of 1387561225 is about 1115.3659573482.

The spelling of 1387561225 in words is "one billion, three hundred eighty-seven million, five hundred sixty-one thousand, two hundred twenty-five".