1125210139 has 4 divisors (see below), whose sum is σ = 1126346560. Its totient is φ = 1124073720.

The previous prime is 1125210133. The next prime is 1125210169. The reversal of 1125210139 is 9310125211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1125210139 - 2⁷ = 1125210011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125210133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566724 + ... + 568705.

It is an arithmetic number, because the mean of its divisors is an integer number (281586640).

Almost surely, 2^1125210139 is an apocalyptic number.

1125210139 is a deficient number, since it is larger than the sum of its proper divisors (1136421).

1125210139 is an equidigital number, since it uses as much as digits as its factorization.

1125210139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136420.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1125210139 is about 33544.1520834854. The cubic root of 1125210139 is about 1040.1066640477.

The spelling of 1125210139 in words is "one billion, one hundred twenty-five million, two hundred ten thousand, one hundred thirty-nine".