2156007 has 8 divisors (see below), whose sum is σ = 3285376. Its totient is φ = 1231992.

The previous prime is 2155999. The next prime is 2156009. The reversal of 2156007 is 7006512.

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

It is not a de Polignac number, because 2156007 - 2³ = 2155999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 102667 = 2156007 / (2 + 1 + 5 + 6 + 0 + 0 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156009) 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, 51313 + ... + 51354.

It is an arithmetic number, because the mean of its divisors is an integer number (410672).

2^2156007 is an apocalyptic number.

2156007 is a deficient number, since it is larger than the sum of its proper divisors (1129369).

2156007 is a wasteful number, since it uses less digits than its factorization.

2156007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102677.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 2156007 is about 1468.3347710928. The cubic root of 2156007 is about 129.1863780301.

The spelling of 2156007 in words is "two million, one hundred fifty-six thousand, seven".