1397915259 has 32 divisors (see below), whose sum is σ = 2027047680. Its totient is φ = 851828352.

The previous prime is 1397915243. The next prime is 1397915293. The reversal of 1397915259 is 9525197931.

It is not a de Polignac number, because 1397915259 - 2⁴ = 1397915243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397915059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2381164 + ... + 2381750.

It is an arithmetic number, because the mean of its divisors is an integer number (63345240).

Almost surely, 2^1397915259 is an apocalyptic number.

1397915259 is a deficient number, since it is larger than the sum of its proper divisors (629132421).

1397915259 is a wasteful number, since it uses less digits than its factorization.

1397915259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099.

The product of its digits is 765450, while the sum is 51.

The square root of 1397915259 is about 37388.7049655374. The cubic root of 1397915259 is about 1118.1333860629.

The spelling of 1397915259 in words is "one billion, three hundred ninety-seven million, nine hundred fifteen thousand, two hundred fifty-nine".