1387752645 has 16 divisors (see below), whose sum is σ = 2229256512. Its totient is φ = 737184000.

The previous prime is 1387752637. The next prime is 1387752701. The reversal of 1387752645 is 5462577831.

It is not a de Polignac number, because 1387752645 - 2³ = 1387752637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387752594 and 1387752603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180532 + ... + 188061.

It is an arithmetic number, because the mean of its divisors is an integer number (139328532).

Almost surely, 2^1387752645 is an apocalyptic number.

1387752645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1387752645 is a deficient number, since it is larger than the sum of its proper divisors (841503867).

1387752645 is a wasteful number, since it uses less digits than its factorization.

1387752645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368852.

The product of its digits is 1411200, while the sum is 48.

The square root of 1387752645 is about 37252.5521944470. The cubic root of 1387752645 is about 1115.4172448231.

The spelling of 1387752645 in words is "one billion, three hundred eighty-seven million, seven hundred fifty-two thousand, six hundred forty-five".