1377408725 has 24 divisors (see below), whose sum is σ = 2129441088. Its totient is φ = 858643200.

The previous prime is 1377408707. The next prime is 1377408727. The reversal of 1377408725 is 5278047731.

It is not a de Polignac number, because 1377408725 - 2⁸ = 1377408469 is a prime.

It is a super-2 number, since 2×1377408725² = 3794509591412251250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377408727) 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, 355844 + ... + 359693.

It is an arithmetic number, because the mean of its divisors is an integer number (88726712).

Almost surely, 2^1377408725 is an apocalyptic number.

It is an amenable number.

1377408725 is a deficient number, since it is larger than the sum of its proper divisors (752032363).

1377408725 is a wasteful number, since it uses less digits than its factorization.

1377408725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715565 (or 715560 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 1377408725 is about 37113.4574649143. The cubic root of 1377408725 is about 1112.6389945427.

The spelling of 1377408725 in words is "one billion, three hundred seventy-seven million, four hundred eight thousand, seven hundred twenty-five".