1397972 has 6 divisors (see below), whose sum is σ = 2446458. Its totient is φ = 698984.

The previous prime is 1397959. The next prime is 1397983. The reversal of 1397972 is 2797931.

It can be written as a sum of positive squares in only one way, i.e., 1359556 + 38416 = 1166^2 + 196^2 .

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, 174743 + ... + 174750.

It is an arithmetic number, because the mean of its divisors is an integer number (407743).

2^1397972 is an apocalyptic number.

It is an amenable number.

1397972 is a deficient number, since it is larger than the sum of its proper divisors (1048486).

1397972 is a wasteful number, since it uses less digits than its factorization.

1397972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349497 (or 349495 counting only the distinct ones).

The product of its digits is 23814, while the sum is 38.

The square root of 1397972 is about 1182.3586596291. The cubic root of 1397972 is about 111.8148514102.

The spelling of 1397972 in words is "one million, three hundred ninety-seven thousand, nine hundred seventy-two".