2621971 has 4 divisors (see below), whose sum is σ = 2860344. Its totient is φ = 2383600.

The previous prime is 2621951. The next prime is 2621987. The reversal of 2621971 is 1791262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2621971 - 2⁹ = 2621459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621921) 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, 119170 + ... + 119191.

It is an arithmetic number, because the mean of its divisors is an integer number (715086).

2^2621971 is an apocalyptic number.

2621971 is a deficient number, since it is larger than the sum of its proper divisors (238373).

2621971 is a wasteful number, since it uses less digits than its factorization.

2621971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238372.

The product of its digits is 1512, while the sum is 28.

The square root of 2621971 is about 1619.2501350934. The cubic root of 2621971 is about 137.8931294686.

The spelling of 2621971 in words is "two million, six hundred twenty-one thousand, nine hundred seventy-one".