2157007 has 2 divisors, whose sum is σ = 2157008. Its totient is φ = 2157006.

The previous prime is 2156993. The next prime is 2157017. The reversal of 2157007 is 7007512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157007 - 2⁷ = 2156879 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2157017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078503 + 1078504.

It is an arithmetic number, because the mean of its divisors is an integer number (1078504).

2^2157007 is an apocalyptic number.

2157007 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157007 is an equidigital number, since it uses as much as digits as its factorization.

2157007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 2157007 is about 1468.6752534172. The cubic root of 2157007 is about 129.2063480348.

The spelling of 2157007 in words is "two million, one hundred fifty-seven thousand, seven".