1397569401 has 12 divisors (see below), whose sum is σ = 2106481728. Its totient is φ = 891203544.

The previous prime is 1397569391. The next prime is 1397569427. The reversal of 1397569401 is 1049657931.

It is not a de Polignac number, because 1397569401 - 2⁹ = 1397568889 is a prime.

It is a super-2 number, since 2×1397569401² = 3906400461222997602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1397569471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3375565 + ... + 3375978.

It is an arithmetic number, because the mean of its divisors is an integer number (175540144).

Almost surely, 2^1397569401 is an apocalyptic number.

It is an amenable number.

1397569401 is a deficient number, since it is larger than the sum of its proper divisors (708912327).

1397569401 is a wasteful number, since it uses less digits than its factorization.

1397569401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751572 (or 6751569 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 1397569401 is about 37384.0795125412. The cubic root of 1397569401 is about 1118.0411660539.

The spelling of 1397569401 in words is "one billion, three hundred ninety-seven million, five hundred sixty-nine thousand, four hundred one".