2156465 has 8 divisors (see below), whose sum is σ = 2597568. Its totient is φ = 1718640.

The previous prime is 2156461. The next prime is 2156491. The reversal of 2156465 is 5646512.

2156465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2156465 - 2² = 2156461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (324696).

2^2156465 is an apocalyptic number.

It is an amenable number.

2156465 is a deficient number, since it is larger than the sum of its proper divisors (441103).

2156465 is a wasteful number, since it uses less digits than its factorization.

2156465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639.

The product of its digits is 7200, while the sum is 29.

The square root of 2156465 is about 1468.4907217957. The cubic root of 2156465 is about 129.1955250585.

The spelling of 2156465 in words is "two million, one hundred fifty-six thousand, four hundred sixty-five".