2139465 has 32 divisors (see below), whose sum is σ = 3649536. Its totient is φ = 1068480.

The previous prime is 2139463. The next prime is 2139481. The reversal of 2139465 is 5649312.

It is not a de Polignac number, because 2139465 - 2¹ = 2139463 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19942 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (114048).

2^2139465 is an apocalyptic number.

It is an amenable number.

2139465 is a deficient number, since it is larger than the sum of its proper divisors (1510071).

2139465 is a wasteful number, since it uses less digits than its factorization.

2139465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189.

The product of its digits is 6480, while the sum is 30.

The square root of 2139465 is about 1462.6910131672. The cubic root of 2139465 is about 128.8551345363.

The spelling of 2139465 in words is "two million, one hundred thirty-nine thousand, four hundred sixty-five".