2420581 has 4 divisors (see below), whose sum is σ = 2548000. Its totient is φ = 2293164.

The previous prime is 2420569. The next prime is 2420609. The reversal of 2420581 is 1850242.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1850242 = 2 ⋅925121.

It is a cyclic number.

It is not a de Polignac number, because 2420581 - 2⁵ = 2420549 is a prime.

It is a super-2 number, since 2×2420581² = 11718424755122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63681 + ... + 63718.

It is an arithmetic number, because the mean of its divisors is an integer number (637000).

2^2420581 is an apocalyptic number.

It is an amenable number.

2420581 is a deficient number, since it is larger than the sum of its proper divisors (127419).

2420581 is a wasteful number, since it uses less digits than its factorization.

2420581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127418.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2420581 is about 1555.8216478761. The cubic root of 2420581 is about 134.2682123281.

The spelling of 2420581 in words is "two million, four hundred twenty thousand, five hundred eighty-one".