1397151 has 24 divisors (see below), whose sum is σ = 2347904. Its totient is φ = 784080.

The previous prime is 1397131. The next prime is 1397153. The reversal of 1397151 is 1517931.

1397151 = 28² + 29² + ... + 161².

It is a happy number.

It is not a de Polignac number, because 1397151 - 2⁵ = 1397119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4056 + ... + 4386.

2^1397151 is an apocalyptic number.

1397151 is a deficient number, since it is larger than the sum of its proper divisors (950753).

1397151 is a wasteful number, since it uses less digits than its factorization.

1397151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 408 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1397151 is about 1182.0114212646. The cubic root of 1397151 is about 111.7929582750.

Subtracting from 1397151 its sum of digits (27), we obtain a square (1397124 = 1182²).

The spelling of 1397151 in words is "one million, three hundred ninety-seven thousand, one hundred fifty-one".