1551972 has 24 divisors (see below), whose sum is σ = 3642016. Its totient is φ = 514368.

The previous prime is 1551967. The next prime is 1551997. The reversal of 1551972 is 2791551.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3168 + ... + 3624.

2^1551972 is an apocalyptic number.

1551972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1551972 is an abundant number, since it is smaller than the sum of its proper divisors (2090044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551972 is a wasteful number, since it uses less digits than its factorization.

1551972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 745 counting only the distinct ones).

The product of its digits is 3150, while the sum is 30.

The square root of 1551972 is about 1245.7816823184. The cubic root of 1551972 is about 115.7785111703.

The spelling of 1551972 in words is "one million, five hundred fifty-one thousand, nine hundred seventy-two".