2145707 has 2 divisors, whose sum is σ = 2145708. Its totient is φ = 2145706.

The previous prime is 2145683. The next prime is 2145709. The reversal of 2145707 is 7075412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145707 - 2⁶ = 2145643 is a prime.

Together with 2145709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2145709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072853 + 1072854.

It is an arithmetic number, because the mean of its divisors is an integer number (1072854).

2^2145707 is an apocalyptic number.

2145707 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145707 is an equidigital number, since it uses as much as digits as its factorization.

2145707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 2145707 is about 1464.8231975225. The cubic root of 2145707 is about 128.9803267076.

The spelling of 2145707 in words is "two million, one hundred forty-five thousand, seven hundred seven".