1379245257 has 24 divisors (see below), whose sum is σ = 2150665608. Its totient is φ = 846720000.

The previous prime is 1379245243. The next prime is 1379245261. The reversal of 1379245257 is 7525429731.

It is a happy number.

1379245257 is a `hidden beast` number, since 1 + 37 + 92 + 4 + 525 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5875776 + 1373369481 = 2424^2 + 37059^2 .

It is not a de Polignac number, because 1379245257 - 2¹¹ = 1379243209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1379245267) 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, 35257 + ... + 63257.

It is an arithmetic number, because the mean of its divisors is an integer number (89611067).

Almost surely, 2^1379245257 is an apocalyptic number.

It is an amenable number.

1379245257 is a deficient number, since it is larger than the sum of its proper divisors (771420351).

1379245257 is a wasteful number, since it uses less digits than its factorization.

1379245257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28441 (or 28438 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 1379245257 is about 37138.1913533764. The cubic root of 1379245257 is about 1113.1332776563.

It can be divided in two parts, 13792 and 45257, that added together give a 10-th power (59049 = 3¹⁰).

The spelling of 1379245257 in words is "one billion, three hundred seventy-nine million, two hundred forty-five thousand, two hundred fifty-seven".