2420861 has 4 divisors (see below), whose sum is σ = 2450112. Its totient is φ = 2391612.

The previous prime is 2420849. The next prime is 2420863. The reversal of 2420861 is 1680242.

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 a de Polignac number, because none of the positive numbers 2^k-2420861 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 (2420863) 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, 14501 + ... + 14666.

It is an arithmetic number, because the mean of its divisors is an integer number (612528).

2^2420861 is an apocalyptic number.

It is an amenable number.

2420861 is a deficient number, since it is larger than the sum of its proper divisors (29251).

2420861 is an equidigital number, since it uses as much as digits as its factorization.

2420861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29250.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2420861 is about 1555.9116298813. The cubic root of 2420861 is about 134.2733892739.

The spelling of 2420861 in words is "two million, four hundred twenty thousand, eight hundred sixty-one".