1231972 has 24 divisors (see below), whose sum is σ = 2572416. Its totient is φ = 504768.

The previous prime is 1231961. The next prime is 1231981. The reversal of 1231972 is 2791321.

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, 313 + ... + 1600.

It is an arithmetic number, because the mean of its divisors is an integer number (107184).

2^1231972 is an apocalyptic number.

It is an amenable number.

1231972 is an abundant number, since it is smaller than the sum of its proper divisors (1340444).

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

1231972 is a wasteful number, since it uses less digits than its factorization.

1231972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1945 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 1231972 is about 1109.9423408448. The cubic root of 1231972 is about 107.2013560755.

It can be divided in two parts, 123 and 1972, that multiplied together give a triangular number (242556 = T₆₉₆).

The spelling of 1231972 in words is "one million, two hundred thirty-one thousand, nine hundred seventy-two".