2420681 has 16 divisors (see below), whose sum is σ = 2757888. Its totient is φ = 2112000.

The previous prime is 2420633. The next prime is 2420687. The reversal of 2420681 is 1860242.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2420681 is a prime.

It is a super-2 number, since 2×2420681² = 11719393007522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420687) 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 15 ways as a sum of consecutive naturals, for example, 15956 + ... + 16106.

It is an arithmetic number, because the mean of its divisors is an integer number (172368).

2^2420681 is an apocalyptic number.

It is an amenable number.

2420681 is a deficient number, since it is larger than the sum of its proper divisors (337207).

2420681 is a wasteful number, since it uses less digits than its factorization.

2420681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

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

The square root of 2420681 is about 1555.8537849040. The cubic root of 2420681 is about 134.2700612831.

It can be divided in two parts, 2420 and 681, that multiplied together give a triangular number (1648020 = T₁₈₁₅).

The spelling of 2420681 in words is "two million, four hundred twenty thousand, six hundred eighty-one".