2164501 has 2 divisors, whose sum is σ = 2164502. Its totient is φ = 2164500.

The previous prime is 2164493. The next prime is 2164511. The reversal of 2164501 is 1054612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 62001 = 1450^2 + 249^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164501 - 2³ = 2164493 is a prime.

It is an Ulam number.

2164501 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2164511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082250 + 1082251.

It is an arithmetic number, because the mean of its divisors is an integer number (1082251).

2^2164501 is an apocalyptic number.

It is an amenable number.

2164501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164501 is an equidigital number, since it uses as much as digits as its factorization.

2164501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2164501 is about 1471.2243200817. The cubic root of 2164501 is about 129.3558071679.

The spelling of 2164501 in words is "two million, one hundred sixty-four thousand, five hundred one".