1392901057 has 4 divisors (see below), whose sum is σ = 1403068356. Its totient is φ = 1382733760.

The previous prime is 1392901049. The next prime is 1392901073. The reversal of 1392901057 is 7501092931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7501092931 = 3229 ⋅2323039.

It can be written as a sum of positive squares in 2 ways, for example, as 1163560321 + 229340736 = 34111^2 + 15144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392901057 - 2³ = 1392901049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392905057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083444 + ... + 5083717.

It is an arithmetic number, because the mean of its divisors is an integer number (350767089).

Almost surely, 2^1392901057 is an apocalyptic number.

It is an amenable number.

1392901057 is a deficient number, since it is larger than the sum of its proper divisors (10167299).

1392901057 is a wasteful number, since it uses less digits than its factorization.

1392901057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10167298.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 1392901057 is about 37321.5896901512. The cubic root of 1392901057 is about 1116.7949016268.

Adding to 1392901057 its reverse (7501092931), we get a palindrome (8893993988).

The spelling of 1392901057 in words is "one billion, three hundred ninety-two million, nine hundred one thousand, fifty-seven".