2150621 has 4 divisors (see below), whose sum is σ = 2346144. Its totient is φ = 1955100.

The previous prime is 2150597. The next prime is 2150639. The reversal of 2150621 is 1260512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2150621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97745 + ... + 97766.

It is an arithmetic number, because the mean of its divisors is an integer number (586536).

2^2150621 is an apocalyptic number.

It is an amenable number.

2150621 is a deficient number, since it is larger than the sum of its proper divisors (195523).

2150621 is a wasteful number, since it uses less digits than its factorization.

2150621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195522.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2150621 is about 1466.4995738151. The cubic root of 2150621 is about 129.0787132533.

The spelling of 2150621 in words is "two million, one hundred fifty thousand, six hundred twenty-one".