2371921 has 8 divisors (see below), whose sum is σ = 2490624. Its totient is φ = 2254560.

The previous prime is 2371883. The next prime is 2371927. The reversal of 2371921 is 1291732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2371921 is a prime.

It is a super-3 number, since 3×2371921³ = 40033348318207388883, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2371927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6280 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (311328).

2^2371921 is an apocalyptic number.

It is an amenable number.

2371921 is a deficient number, since it is larger than the sum of its proper divisors (118703).

2371921 is a wasteful number, since it uses less digits than its factorization.

2371921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 756, while the sum is 25.

The square root of 2371921 is about 1540.1042172528. The cubic root of 2371921 is about 133.3624013013.

The spelling of 2371921 in words is "two million, three hundred seventy-one thousand, nine hundred twenty-one".