2640361 has 2 divisors, whose sum is σ = 2640362. Its totient is φ = 2640360.

The previous prime is 2640349. The next prime is 2640367. The reversal of 2640361 is 1630462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 1115136 = 1235^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640361 - 2¹³ = 2632169 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320180 + 1320181.

It is an arithmetic number, because the mean of its divisors is an integer number (1320181).

2^2640361 is an apocalyptic number.

It is an amenable number.

2640361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640361 is an equidigital number, since it uses as much as digits as its factorization.

2640361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 2640361 is about 1624.9187672004. The cubic root of 2640361 is about 138.2147639666.

The spelling of 2640361 in words is "two million, six hundred forty thousand, three hundred sixty-one".