48129021 has 6 divisors (see below), whose sum is σ = 69519710. Its totient is φ = 32086008.

The previous prime is 48129017. The next prime is 48129031. The reversal of 48129021 is 12092184.

It can be written as a sum of positive squares in only one way, i.e., 31236921 + 16892100 = 5589^2 + 4110^2 .

It is not a de Polignac number, because 48129021 - 2² = 48129017 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 (48129031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2673826 + ... + 2673843.

Almost surely, 2^48129021 is an apocalyptic number.

It is an amenable number.

48129021 is a deficient number, since it is larger than the sum of its proper divisors (21390689).

48129021 is a wasteful number, since it uses less digits than its factorization.

48129021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347675 (or 5347672 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 48129021 is about 6937.5082702653. The cubic root of 48129021 is about 363.7494476911.

The spelling of 48129021 in words is "forty-eight million, one hundred twenty-nine thousand, twenty-one".