1391325290 has 16 divisors (see below), whose sum is σ = 2509201800. Its totient is φ = 555459840.

The previous prime is 1391325289. The next prime is 1391325307. The reversal of 1391325290 is 925231931.

It can be written as a sum of positive squares in 4 ways, for example, as 1203881809 + 187443481 = 34697^2 + 13691^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1391325290.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 128315 + ... + 138734.

Almost surely, 2^1391325290 is an apocalyptic number.

1391325290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1391325290 is a deficient number, since it is larger than the sum of its proper divisors (1117876510).

1391325290 is a wasteful number, since it uses less digits than its factorization.

1391325290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267577.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 1391325290 is about 37300.4730533005. The cubic root of 1391325290 is about 1116.3736052314.

The spelling of 1391325290 in words is "one billion, three hundred ninety-one million, three hundred twenty-five thousand, two hundred ninety".