1125220392 has 96 divisors (see below), whose sum is σ = 3157839360. Its totient is φ = 361584000.

The previous prime is 1125220367. The next prime is 1125220403. The reversal of 1125220392 is 2930225211.

It is a happy number.

1125220392 is a `hidden beast` number, since 1 + 1 + 252 + 20 + 392 = 666.

It is a super-2 number, since 2×1125220392² = 2532241861145267328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 693342 + ... + 694962.

It is an arithmetic number, because the mean of its divisors is an integer number (32894160).

Almost surely, 2^1125220392 is an apocalyptic number.

1125220392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125220392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578919680).

1125220392 is an abundant number, since it is smaller than the sum of its proper divisors (2032618968).

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

1125220392 is a wasteful number, since it uses less digits than its factorization.

1125220392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1125220392 is about 33544.3049115643. The cubic root of 1125220392 is about 1040.1098232150.

The spelling of 1125220392 in words is "one billion, one hundred twenty-five million, two hundred twenty thousand, three hundred ninety-two".