1897972 has 24 divisors (see below), whose sum is σ = 3471552. Its totient is φ = 907200.

The previous prime is 1897969. The next prime is 1897979. The reversal of 1897972 is 2797981.

It is a happy number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897979) 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, 11563 + ... + 11725.

It is an arithmetic number, because the mean of its divisors is an integer number (144648).

2^1897972 is an apocalyptic number.

It is an amenable number.

1897972 is a deficient number, since it is larger than the sum of its proper divisors (1573580).

1897972 is a wasteful number, since it uses less digits than its factorization.

1897972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 277 counting only the distinct ones).

The product of its digits is 63504, while the sum is 43.

The square root of 1897972 is about 1377.6690458887. The cubic root of 1897972 is about 123.8121505313.

Subtracting 1897972 from its reverse (2797981), we obtain a palindrome (900009).

The spelling of 1897972 in words is "one million, eight hundred ninety-seven thousand, nine hundred seventy-two".