1339492257 has 12 divisors (see below), whose sum is σ = 1961327524. Its totient is φ = 880761600.

The previous prime is 1339492247. The next prime is 1339492279. The reversal of 1339492257 is 7522949331.

1339492257 is a `hidden beast` number, since 1 + 3 + 394 + 9 + 2 + 257 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1104299361 + 235192896 = 33231^2 + 15336^2 .

It is not a de Polignac number, because 1339492257 - 2¹⁴ = 1339475873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1339492247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018744 + ... + 1020057.

Almost surely, 2^1339492257 is an apocalyptic number.

It is an amenable number.

1339492257 is a deficient number, since it is larger than the sum of its proper divisors (621835267).

1339492257 is a wasteful number, since it uses less digits than its factorization.

1339492257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038880 (or 2038877 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 1339492257 is about 36599.0745374798. The cubic root of 1339492257 is about 1102.3345067590.

The spelling of 1339492257 in words is "one billion, three hundred thirty-nine million, four hundred ninety-two thousand, two hundred fifty-seven".