1392564225 has 72 divisors (see below), whose sum is σ = 2511005952. Its totient is φ = 680659200.

The previous prime is 1392564211. The next prime is 1392564259. The reversal of 1392564225 is 5224652931.

It is not a de Polignac number, because 1392564225 - 2⁵ = 1392564193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2293872 + ... + 2294478.

Almost surely, 2^1392564225 is an apocalyptic number.

1392564225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1392564225 is a deficient number, since it is larger than the sum of its proper divisors (1118441727).

1392564225 is a wasteful number, since it uses less digits than its factorization.

1392564225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 809 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 1392564225 is about 37317.0768549735. The cubic root of 1392564225 is about 1116.7048730771.

The spelling of 1392564225 in words is "one billion, three hundred ninety-two million, five hundred sixty-four thousand, two hundred twenty-five".