120447021 has 16 divisors (see below), whose sum is σ = 168038784. Its totient is φ = 76595904.

The previous prime is 120446969. The next prime is 120447043. The reversal of 120447021 is 120744021.

It is a happy number.

It is not a de Polignac number, because 120447021 - 2⁶ = 120446957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120447421) 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, 25195 + ... + 29591.

It is an arithmetic number, because the mean of its divisors is an integer number (10502424).

Almost surely, 2^120447021 is an apocalyptic number.

It is an amenable number.

120447021 is a deficient number, since it is larger than the sum of its proper divisors (47591763).

120447021 is a wasteful number, since it uses less digits than its factorization.

120447021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 120447021 is about 10974.8358074278. The cubic root of 120447021 is about 493.8541273526.

The spelling of 120447021 in words is "one hundred twenty million, four hundred forty-seven thousand, twenty-one".