125335021 has 16 divisors (see below), whose sum is σ = 147726976. Its totient is φ = 104089536.

The previous prime is 125335009. The next prime is 125335031. The reversal of 125335021 is 120533521.

It is a cyclic number.

It is not a de Polignac number, because 125335021 - 2²¹ = 123237869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125334983 and 125335001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125335031) 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, 70870 + ... + 72616.

It is an arithmetic number, because the mean of its divisors is an integer number (9232936).

Almost surely, 2^125335021 is an apocalyptic number.

It is an amenable number.

125335021 is a deficient number, since it is larger than the sum of its proper divisors (22391955).

125335021 is a wasteful number, since it uses less digits than its factorization.

125335021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 125335021 is about 11195.3124565597. The cubic root of 125335021 is about 500.4462961876.

Adding to 125335021 its reverse (120533521), we get a palindrome (245868542).

The spelling of 125335021 in words is "one hundred twenty-five million, three hundred thirty-five thousand, twenty-one".