2420731 has 4 divisors (see below), whose sum is σ = 2430000. Its totient is φ = 2411464.

The previous prime is 2420723. The next prime is 2420767. The reversal of 2420731 is 1370242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2420731 - 2³ = 2420723 is a prime.

It is a super-2 number, since 2×2420731² = 11719877148722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2420699 and 2420708.

It is not an unprimeable number, because it can be changed into a prime (2420701) 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, 4231 + ... + 4768.

It is an arithmetic number, because the mean of its divisors is an integer number (607500).

2^2420731 is an apocalyptic number.

2420731 is a deficient number, since it is larger than the sum of its proper divisors (9269).

2420731 is an equidigital number, since it uses as much as digits as its factorization.

2420731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 2420731 is about 1555.8698531690. The cubic root of 2420731 is about 134.2709857415.

Adding to 2420731 its reverse (1370242), we get a palindrome (3790973).

The spelling of 2420731 in words is "two million, four hundred twenty thousand, seven hundred thirty-one".