1125115890 has 32 divisors (see below), whose sum is σ = 2702068416. Its totient is φ = 299832000.

The previous prime is 1125115883. The next prime is 1125115897. The reversal of 1125115890 is 985115211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1125115883) and next prime (1125115897).

It is not an unprimeable number, because it can be changed into a prime (1125115897) 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, 36765 + ... + 60015.

It is an arithmetic number, because the mean of its divisors is an integer number (84439638).

Almost surely, 2^1125115890 is an apocalyptic number.

1125115890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125115890 is an abundant number, since it is smaller than the sum of its proper divisors (1576952526).

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

1125115890 is a wasteful number, since it uses less digits than its factorization.

1125115890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24874.

The product of its (nonzero) digits is 3600, while the sum is 33.

The square root of 1125115890 is about 33542.7472041275. The cubic root of 1125115890 is about 1040.0776230278.

The spelling of 1125115890 in words is "one billion, one hundred twenty-five million, one hundred fifteen thousand, eight hundred ninety".