2900861 has 4 divisors (see below), whose sum is σ = 2920224. Its totient is φ = 2881500.

The previous prime is 2900857. The next prime is 2900869. The reversal of 2900861 is 1680092.

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 not a de Polignac number, because 2900861 - 2² = 2900857 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 2900861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2900869) 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, 9455 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (730056).

2^2900861 is an apocalyptic number.

It is an amenable number.

2900861 is a deficient number, since it is larger than the sum of its proper divisors (19363).

2900861 is a wasteful number, since it uses less digits than its factorization.

2900861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19362.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2900861 is about 1703.1914161362. The cubic root of 2900861 is about 142.6184262275.

The spelling of 2900861 in words is "two million, nine hundred thousand, eight hundred sixty-one".