1209972 has 24 divisors (see below), whose sum is σ = 2872800. Its totient is φ = 396256.

The previous prime is 1209959. The next prime is 1209973. The reversal of 1209972 is 2799021.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1209973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^1209972 is an apocalyptic number.

1209972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1209972 is an abundant number, since it is smaller than the sum of its proper divisors (1662828).

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

1209972 is a wasteful number, since it uses less digits than its factorization.

1209972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775 (or 1773 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1209972 is about 1099.9872726536. The cubic root of 1209972 is about 106.5594017182.

The spelling of 1209972 in words is "one million, two hundred nine thousand, nine hundred seventy-two".