2902121 has 8 divisors (see below), whose sum is σ = 3131784. Its totient is φ = 2679040.

The previous prime is 2902111. The next prime is 2902147. The reversal of 2902121 is 1212092.

It can be written as a sum of positive squares in 4 ways, for example, as 1488400 + 1413721 = 1220^2 + 1189^2 .

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 2902121 - 2⁶ = 2902057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2902121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2902111) 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, 710 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (391473).

2^2902121 is an apocalyptic number.

It is an amenable number.

2902121 is a deficient number, since it is larger than the sum of its proper divisors (229663).

2902121 is a wasteful number, since it uses less digits than its factorization.

2902121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2902121 is about 1703.5612698110. The cubic root of 2902121 is about 142.6390721904.

The spelling of 2902121 in words is "two million, nine hundred two thousand, one hundred twenty-one".