2973621 has 8 divisors (see below), whose sum is σ = 4531264. Its totient is φ = 1699200.

The previous prime is 2973617. The next prime is 2973667. The reversal of 2973621 is 1263792.

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

It is not a de Polignac number, because 2973621 - 2² = 2973617 is a prime.

It is a Duffinian number.

It is a Curzon number.

2973621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2973611) 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, 70780 + ... + 70821.

It is an arithmetic number, because the mean of its divisors is an integer number (566408).

2^2973621 is an apocalyptic number.

2973621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2973621 is a deficient number, since it is larger than the sum of its proper divisors (1557643).

2973621 is a wasteful number, since it uses less digits than its factorization.

2973621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141611.

The product of its digits is 4536, while the sum is 30.

The square root of 2973621 is about 1724.4190326020. The cubic root of 2973621 is about 143.8009885913.

The spelling of 2973621 in words is "two million, nine hundred seventy-three thousand, six hundred twenty-one".