1397200571 has 6 divisors (see below), whose sum is σ = 1512945180. Its totient is φ = 1289723448.

The previous prime is 1397200559. The next prime is 1397200579. The reversal of 1397200571 is 1750027931.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1397200571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397200579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4133561 + ... + 4133898.

It is an arithmetic number, because the mean of its divisors is an integer number (252157530).

Almost surely, 2^1397200571 is an apocalyptic number.

1397200571 is a deficient number, since it is larger than the sum of its proper divisors (115744609).

1397200571 is an equidigital number, since it uses as much as digits as its factorization.

1397200571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267485 (or 8267472 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 1397200571 is about 37379.1462048025. The cubic root of 1397200571 is about 1117.9428039966.

The spelling of 1397200571 in words is "one billion, three hundred ninety-seven million, two hundred thousand, five hundred seventy-one".