2151207 has 6 divisors (see below), whose sum is σ = 3107312. Its totient is φ = 1434132.

The previous prime is 2151203. The next prime is 2151211. The reversal of 2151207 is 7021512.

It is an interprime number because it is at equal distance from previous prime (2151203) and next prime (2151211).

It is not a de Polignac number, because 2151207 - 2² = 2151203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2151207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119503 + ... + 119520.

2^2151207 is an apocalyptic number.

2151207 is a deficient number, since it is larger than the sum of its proper divisors (956105).

2151207 is a wasteful number, since it uses less digits than its factorization.

2151207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239029 (or 239026 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2151207 is about 1466.6993556963. The cubic root of 2151207 is about 129.0904359537.

Adding to 2151207 its reverse (7021512), we get a palindrome (9172719).

The spelling of 2151207 in words is "two million, one hundred fifty-one thousand, two hundred seven".