1377460021 has 12 divisors (see below), whose sum is σ = 1603094220. Its totient is φ = 1180132800.

The previous prime is 1377460001. The next prime is 1377460109. The reversal of 1377460021 is 1200647731.

It can be written as a sum of positive squares in 2 ways, for example, as 1325979396 + 51480625 = 36414^2 + 7175^2 .

It is not a de Polignac number, because 1377460021 - 2⁵ = 1377459989 is a prime.

It is a super-2 number, since 2×1377460021² = 3794792218906640882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377460001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128571 + ... + 138871.

It is an arithmetic number, because the mean of its divisors is an integer number (133591185).

Almost surely, 2^1377460021 is an apocalyptic number.

It is an amenable number.

1377460021 is a deficient number, since it is larger than the sum of its proper divisors (225634199).

1377460021 is a wasteful number, since it uses less digits than its factorization.

1377460021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044 (or 13037 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 1377460021 is about 37114.1485285598. The cubic root of 1377460021 is about 1112.6528062798.

The spelling of 1377460021 in words is "one billion, three hundred seventy-seven million, four hundred sixty thousand, twenty-one".