1125145420 has 48 divisors (see below), whose sum is σ = 2842479360. Its totient is φ = 365459904.

The previous prime is 1125145397. The next prime is 1125145421. The reversal of 1125145420 is 245415211.

It is a super-2 number, since 2×1125145420² = 2531904432293952800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1125145421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208834 + ... + 214153.

It is an arithmetic number, because the mean of its divisors is an integer number (59218320).

Almost surely, 2^1125145420 is an apocalyptic number.

1125145420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125145420 is an abundant number, since it is smaller than the sum of its proper divisors (1717333940).

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

1125145420 is a wasteful number, since it uses less digits than its factorization.

1125145420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423022 (or 423020 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1125145420 is about 33543.1873858165. The cubic root of 1125145420 is about 1040.0867223048.

The spelling of 1125145420 in words is "one billion, one hundred twenty-five million, one hundred forty-five thousand, four hundred twenty".