1381458239 has 16 divisors (see below), whose sum is σ = 1685944320. Its totient is φ = 1106390880.

The previous prime is 1381458209. The next prime is 1381458241. The reversal of 1381458239 is 9328541831.

It is a de Polignac number, because none of the positive numbers 2^k-1381458239 is a prime.

It is a super-2 number, since 2×1381458239² = 3816853732201962242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381458239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381458209) 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 15 ways as a sum of consecutive naturals, for example, 103469 + ... + 116054.

It is an arithmetic number, because the mean of its divisors is an integer number (105371520).

Almost surely, 2^1381458239 is an apocalyptic number.

1381458239 is a deficient number, since it is larger than the sum of its proper divisors (304486081).

1381458239 is a wasteful number, since it uses less digits than its factorization.

1381458239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219590.

The product of its digits is 207360, while the sum is 44.

The square root of 1381458239 is about 37167.9732969125. The cubic root of 1381458239 is about 1113.7282957407.

The spelling of 1381458239 in words is "one billion, three hundred eighty-one million, four hundred fifty-eight thousand, two hundred thirty-nine".