2145965 has 8 divisors (see below), whose sum is σ = 2606688. Its totient is φ = 1695760.

The previous prime is 2145953. The next prime is 2145977. The reversal of 2145965 is 5695412.

2145965 = 118² + 119² + ... + 200².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2145953) and next prime (2145977).

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

It is not a de Polignac number, because 2145965 - 2⁸ = 2145709 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2171 + ... + 3000.

It is an arithmetic number, because the mean of its divisors is an integer number (325836).

2^2145965 is an apocalyptic number.

It is an amenable number.

2145965 is a deficient number, since it is larger than the sum of its proper divisors (460723).

2145965 is an equidigital number, since it uses as much as digits as its factorization.

2145965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259.

The product of its digits is 10800, while the sum is 32.

The square root of 2145965 is about 1464.9112601110. The cubic root of 2145965 is about 128.9854960357.

The spelling of 2145965 in words is "two million, one hundred forty-five thousand, nine hundred sixty-five".