125121534 has 16 divisors (see below), whose sum is σ = 251061888. Its totient is φ = 41570712.

The previous prime is 125121533. The next prime is 125121551. The reversal of 125121534 is 435121521.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125121533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32122 + ... + 35805.

It is an arithmetic number, because the mean of its divisors is an integer number (15691368).

Almost surely, 2^125121534 is an apocalyptic number.

125121534 is an abundant number, since it is smaller than the sum of its proper divisors (125940354).

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

125121534 is a wasteful number, since it uses less digits than its factorization.

125121534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68239.

The product of its digits is 1200, while the sum is 24.

The square root of 125121534 is about 11185.7737327375. The cubic root of 125121534 is about 500.1619928443.

The spelling of 125121534 in words is "one hundred twenty-five million, one hundred twenty-one thousand, five hundred thirty-four".