1972637 has 8 divisors (see below), whose sum is σ = 2121600. Its totient is φ = 1829052.

The previous prime is 1972627. The next prime is 1972643. The reversal of 1972637 is 7362791.

It is not a de Polignac number, because 1972637 - 2⁸ = 1972381 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1972597 and 1972606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41948 + ... + 41994.

It is an arithmetic number, because the mean of its divisors is an integer number (265200).

2^1972637 is an apocalyptic number.

It is an amenable number.

1972637 is a deficient number, since it is larger than the sum of its proper divisors (148963).

1972637 is an frugal number, since it uses more digits than its factorization.

1972637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 66 counting only the distinct ones).

The product of its digits is 15876, while the sum is 35.

The square root of 1972637 is about 1404.5059629635. The cubic root of 1972637 is about 125.4148774899.

The spelling of 1972637 in words is "one million, nine hundred seventy-two thousand, six hundred thirty-seven".