1972399 has 12 divisors (see below), whose sum is σ = 2332152. Its totient is φ = 1653600.

The previous prime is 1972381. The next prime is 1972417. The reversal of 1972399 is 9932791.

It is an interprime number because it is at equal distance from previous prime (1972381) and next prime (1972417).

It is not a de Polignac number, because 1972399 - 2⁹ = 1971887 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 (1972349) 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, 1329 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (194346).

2^1972399 is an apocalyptic number.

1972399 is a deficient number, since it is larger than the sum of its proper divisors (359753).

1972399 is a wasteful number, since it uses less digits than its factorization.

1972399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1085 counting only the distinct ones).

The product of its digits is 30618, while the sum is 40.

The square root of 1972399 is about 1404.4212331064. The cubic root of 1972399 is about 125.4098334902.

The spelling of 1972399 in words is "one million, nine hundred seventy-two thousand, three hundred ninety-nine".