2420657 has 4 divisors (see below), whose sum is σ = 2548080. Its totient is φ = 2293236.

The previous prime is 2420633. The next prime is 2420687. The reversal of 2420657 is 7560242.

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 2420657 - 2¹⁶ = 2355121 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

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 3 ways as a sum of consecutive naturals, for example, 63683 + ... + 63720.

It is an arithmetic number, because the mean of its divisors is an integer number (637020).

2^2420657 is an apocalyptic number.

It is an amenable number.

2420657 is a deficient number, since it is larger than the sum of its proper divisors (127423).

2420657 is a wasteful number, since it uses less digits than its factorization.

2420657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127422.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2420657 is about 1555.8460720778. The cubic root of 2420657 is about 134.2696175385.

Adding to 2420657 its reverse (7560242), we get a palindrome (9980899).

The spelling of 2420657 in words is "two million, four hundred twenty thousand, six hundred fifty-seven".