2978621 has 8 divisors (see below), whose sum is σ = 3193344. Its totient is φ = 2768320.

The previous prime is 2978593. The next prime is 2978627. The reversal of 2978621 is 1268792.

It is a happy number.

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 2978621 - 2¹⁴ = 2962237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978627) 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, 356 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (399168).

2^2978621 is an apocalyptic number.

It is an amenable number.

2978621 is a deficient number, since it is larger than the sum of its proper divisors (214723).

2978621 is a wasteful number, since it uses less digits than its factorization.

2978621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211.

The product of its digits is 12096, while the sum is 35.

The square root of 2978621 is about 1725.8681873191. The cubic root of 2978621 is about 143.8815415970.

The spelling of 2978621 in words is "two million, nine hundred seventy-eight thousand, six hundred twenty-one".