2121648 has 20 divisors (see below), whose sum is σ = 5481048. Its totient is φ = 707200.

The previous prime is 2121631. The next prime is 2121653. The reversal of 2121648 is 8461212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22053 + ... + 22148.

2^2121648 is an apocalyptic number.

It is an amenable number.

2121648 is an abundant number, since it is smaller than the sum of its proper divisors (3359400).

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

2121648 is a wasteful number, since it uses less digits than its factorization.

2121648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44212 (or 44206 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 2121648 is about 1456.5877934405. The cubic root of 2121648 is about 128.4964444605.

The spelling of 2121648 in words is "two million, one hundred twenty-one thousand, six hundred forty-eight".