1372731645 has 16 divisors (see below), whose sum is σ = 2209070592. Its totient is φ = 727890240.

The previous prime is 1372731629. The next prime is 1372731713. The reversal of 1372731645 is 5461372731.

It is not a de Polignac number, because 1372731645 - 2⁴ = 1372731629 is a prime.

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, 261901 + ... + 267090.

It is an arithmetic number, because the mean of its divisors is an integer number (138066912).

Almost surely, 2^1372731645 is an apocalyptic number.

1372731645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1372731645 is a deficient number, since it is larger than the sum of its proper divisors (836338947).

1372731645 is a wasteful number, since it uses less digits than its factorization.

1372731645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529172.

The product of its digits is 105840, while the sum is 39.

The square root of 1372731645 is about 37050.3933177504. The cubic root of 1372731645 is about 1111.3782206728.

The spelling of 1372731645 in words is "one billion, three hundred seventy-two million, seven hundred thirty-one thousand, six hundred forty-five".