1243972 has 12 divisors (see below), whose sum is σ = 2185596. Its totient is φ = 619520.

The previous prime is 1243969. The next prime is 1243997. The reversal of 1243972 is 2793421.

It can be written as a sum of positive squares in 2 ways, for example, as 352836 + 891136 = 594^2 + 944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1243972.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 972 + ... + 1852.

It is an arithmetic number, because the mean of its divisors is an integer number (182133).

2^1243972 is an apocalyptic number.

It is an amenable number.

1243972 is a deficient number, since it is larger than the sum of its proper divisors (941624).

1243972 is a wasteful number, since it uses less digits than its factorization.

1243972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1236 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 1243972 is about 1115.3349272752. The cubic root of 1243972 is about 107.5482963085.

It can be divided in two parts, 124 and 3972, that multiplied together give a triangular number (492528 = T₉₉₂).

The spelling of 1243972 in words is "one million, two hundred forty-three thousand, nine hundred seventy-two".