2137421 has 8 divisors (see below), whose sum is σ = 2511264. Its totient is φ = 1793520.

The previous prime is 2137411. The next prime is 2137423. The reversal of 2137421 is 1247312.

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

It is a cyclic number.

It is not a de Polignac number, because 2137421 - 2¹⁸ = 1875277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2137393 and 2137402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137423) 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, 7331 + ... + 7616.

It is an arithmetic number, because the mean of its divisors is an integer number (313908).

2^2137421 is an apocalyptic number.

It is an amenable number.

2137421 is a deficient number, since it is larger than the sum of its proper divisors (373843).

2137421 is a wasteful number, since it uses less digits than its factorization.

2137421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14971.

The product of its digits is 336, while the sum is 20.

The square root of 2137421 is about 1461.9921340418. The cubic root of 2137421 is about 128.8140862968.

The spelling of 2137421 in words is "two million, one hundred thirty-seven thousand, four hundred twenty-one".