1381625801 has 24 divisors (see below), whose sum is σ = 1509225480. Its totient is φ = 1263105536.

The previous prime is 1381625789. The next prime is 1381625807. The reversal of 1381625801 is 1085261831.

It can be written as a sum of positive squares in 4 ways, for example, as 6996025 + 1374629776 = 2645^2 + 37076^2 .

It is not a de Polignac number, because 1381625801 - 2³⁰ = 307883977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381625807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1733135 + ... + 1733931.

It is an arithmetic number, because the mean of its divisors is an integer number (62884395).

Almost surely, 2^1381625801 is an apocalyptic number.

It is an amenable number.

1381625801 is a deficient number, since it is larger than the sum of its proper divisors (127599679).

1381625801 is a wasteful number, since it uses less digits than its factorization.

1381625801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1381625801 is about 37170.2273466278. The cubic root of 1381625801 is about 1113.7733232801.

The spelling of 1381625801 in words is "one billion, three hundred eighty-one million, six hundred twenty-five thousand, eight hundred one".