2420661 has 8 divisors (see below), whose sum is σ = 3258144. Its totient is φ = 1598480.

The previous prime is 2420633. The next prime is 2420687. The reversal of 2420661 is 1660242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2420661 - 2¹¹ = 2418613 is a prime.

It is a Curzon number.

2420661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2420611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3450 + ... + 4091.

It is an arithmetic number, because the mean of its divisors is an integer number (407268).

2^2420661 is an apocalyptic number.

It is an amenable number.

2420661 is a deficient number, since it is larger than the sum of its proper divisors (837483).

2420661 is a wasteful number, since it uses less digits than its factorization.

2420661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7651.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2420661 is about 1555.8473575515. The cubic root of 2420661 is about 134.2696914962.

It can be divided in two parts, 2420 and 661, that added together give a triangular number (3081 = T₇₈).

The spelling of 2420661 in words is "two million, four hundred twenty thousand, six hundred sixty-one".