1125156420 has 60 divisors (see below), whose sum is σ = 3529662444. Its totient is φ = 300041280.

The previous prime is 1125156419. The next prime is 1125156449. The reversal of 1125156420 is 246515211.

1125156420 is a `hidden beast` number, since 1 + 1 + 2 + 5 + 15 + 642 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 430728516 + 694427904 = 20754^2 + 26352^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 345651 + ... + 348890.

Almost surely, 2^1125156420 is an apocalyptic number.

1125156420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125156420 is an abundant number, since it is smaller than the sum of its proper divisors (2404506024).

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

1125156420 is a wasteful number, since it uses less digits than its factorization.

1125156420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694562 (or 694551 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1125156420 is about 33543.3513531370. The cubic root of 1125156420 is about 1040.0901117679.

The spelling of 1125156420 in words is "one billion, one hundred twenty-five million, one hundred fifty-six thousand, four hundred twenty".