1397125220 has 48 divisors (see below), whose sum is σ = 3001961088. Its totient is φ = 546040320.

The previous prime is 1397125211. The next prime is 1397125237. The reversal of 1397125220 is 225217931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156107 + ... + 164813.

It is an arithmetic number, because the mean of its divisors is an integer number (62540856).

Almost surely, 2^1397125220 is an apocalyptic number.

1397125220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397125220 is an abundant number, since it is smaller than the sum of its proper divisors (1604835868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397125220 is a wasteful number, since it uses less digits than its factorization.

1397125220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900 (or 8898 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1397125220 is about 37378.1382628937. The cubic root of 1397125220 is about 1117.9227067573.

The spelling of 1397125220 in words is "one billion, three hundred ninety-seven million, one hundred twenty-five thousand, two hundred twenty".