1397908142 has 4 divisors (see below), whose sum is σ = 2096862216. Its totient is φ = 698954070.

The previous prime is 1397908129. The next prime is 1397908151. The reversal of 1397908142 is 2418097931.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×1397908142³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1397908093 and 1397908102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349477034 + ... + 349477037.

It is an arithmetic number, because the mean of its divisors is an integer number (524215554).

Almost surely, 2^1397908142 is an apocalyptic number.

1397908142 is a deficient number, since it is larger than the sum of its proper divisors (698954074).

1397908142 is an equidigital number, since it uses as much as digits as its factorization.

1397908142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698954073.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1397908142 is about 37388.6097896137. The cubic root of 1397908142 is about 1118.1314885304.

The spelling of 1397908142 in words is "one billion, three hundred ninety-seven million, nine hundred eight thousand, one hundred forty-two".