1225472 has 18 divisors (see below), whose sum is σ = 2446668. Its totient is φ = 612608.

The previous prime is 1225459. The next prime is 1225493. The reversal of 1225472 is 2745221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2138 + ... + 2649.

It is an arithmetic number, because the mean of its divisors is an integer number (135926).

2^1225472 is an apocalyptic number.

It is an amenable number.

1225472 is a deficient number, since it is larger than the sum of its proper divisors (1221196).

1225472 is an frugal number, since it uses more digits than its factorization.

1225472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803 (or 4789 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 1225472 is about 1107.0103883885. The cubic root of 1225472 is about 107.0124887161.

Subtracting from 1225472 its sum of digits (23), we obtain a square (1225449 = 1107²).

It can be divided in two parts, 12254 and 72, that multiplied together give a palindrome (882288).

The spelling of 1225472 in words is "one million, two hundred twenty-five thousand, four hundred seventy-two".