120825421 has 4 divisors (see below), whose sum is σ = 122183100. Its totient is φ = 119467744.

The previous prime is 120825413. The next prime is 120825469. The reversal of 120825421 is 124528021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 100701225 = 4486^2 + 10035^2 .

It is a cyclic number.

It is not a de Polignac number, because 120825421 - 2³ = 120825413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120825491) 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, 678706 + ... + 678883.

It is an arithmetic number, because the mean of its divisors is an integer number (30545775).

Almost surely, 2^120825421 is an apocalyptic number.

It is an amenable number.

120825421 is a deficient number, since it is larger than the sum of its proper divisors (1357679).

120825421 is an equidigital number, since it uses as much as digits as its factorization.

120825421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357678.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 120825421 is about 10992.0617265370. The cubic root of 120825421 is about 494.3707557267.

The spelling of 120825421 in words is "one hundred twenty million, eight hundred twenty-five thousand, four hundred twenty-one".