1376645121 has 12 divisors (see below), whose sum is σ = 2001834900. Its totient is φ = 911603040.

The previous prime is 1376645099. The next prime is 1376645131. The reversal of 1376645121 is 1215466731.

1376645121 is a `hidden beast` number, since 1 + 3 + 7 + 6 + 645 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 131331600 + 1245313521 = 11460^2 + 35289^2 .

It is not a de Polignac number, because 1376645121 - 2⁵ = 1376645089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1376645131) by changing a digit.

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, 511950 + ... + 514631.

It is an arithmetic number, because the mean of its divisors is an integer number (166819575).

Almost surely, 2^1376645121 is an apocalyptic number.

It is an amenable number.

1376645121 is a deficient number, since it is larger than the sum of its proper divisors (625189779).

1376645121 is a wasteful number, since it uses less digits than its factorization.

1376645121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026736 (or 1026733 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1376645121 is about 37103.1686113194. The cubic root of 1376645121 is about 1112.4333493041.

The spelling of 1376645121 in words is "one billion, three hundred seventy-six million, six hundred forty-five thousand, one hundred twenty-one".