1397126139 has 16 divisors (see below), whose sum is σ = 1903756800. Its totient is φ = 911173536.

The previous prime is 1397126131. The next prime is 1397126173. The reversal of 1397126139 is 9316217931.

It is not a de Polignac number, because 1397126139 - 2³ = 1397126131 is a prime.

It is a super-2 number, since 2×1397126139² = 3903922896554094642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1397126139.

It is not an unprimeable number, because it can be changed into a prime (1397126131) 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 15 ways as a sum of consecutive naturals, for example, 1209 + ... + 52874.

It is an arithmetic number, because the mean of its divisors is an integer number (118984800).

Almost surely, 2^1397126139 is an apocalyptic number.

1397126139 is a deficient number, since it is larger than the sum of its proper divisors (506630661).

1397126139 is a wasteful number, since it uses less digits than its factorization.

1397126139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54274.

The product of its digits is 61236, while the sum is 42.

The square root of 1397126139 is about 37378.1505561739. The cubic root of 1397126139 is about 1117.9229518727.

The spelling of 1397126139 in words is "one billion, three hundred ninety-seven million, one hundred twenty-six thousand, one hundred thirty-nine".