2961665 has 16 divisors (see below), whose sum is σ = 4173312. Its totient is φ = 1975104.

The previous prime is 2961659. The next prime is 2961667. The reversal of 2961665 is 5661692.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2961665 - 2¹⁰ = 2960641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2961667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (260832).

2^2961665 is an apocalyptic number.

It is an amenable number.

2961665 is a deficient number, since it is larger than the sum of its proper divisors (1211647).

2961665 is a wasteful number, since it uses less digits than its factorization.

2961665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 19440, while the sum is 35.

The square root of 2961665 is about 1720.9488661782. The cubic root of 2961665 is about 143.6080034490.

The spelling of 2961665 in words is "two million, nine hundred sixty-one thousand, six hundred sixty-five".