2591254921 has 2 divisors, whose sum is σ = 2591254922. Its totient is φ = 2591254920.

The previous prime is 2591254907. The next prime is 2591254943. The reversal of 2591254921 is 1294521952.

2591254921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1588899321 + 1002355600 = 39861^2 + 31660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2591254921 - 2²³ = 2582866313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2591254021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295627460 + 1295627461.

It is an arithmetic number, because the mean of its divisors is an integer number (1295627461).

Almost surely, 2^2591254921 is an apocalyptic number.

It is an amenable number.

2591254921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2591254921 is an equidigital number, since it uses as much as digits as its factorization.

2591254921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 2591254921 is about 50904.3703526524. The cubic root of 2591254921 is about 1373.5254576875.

The spelling of 2591254921 in words is "two billion, five hundred ninety-one million, two hundred fifty-four thousand, nine hundred twenty-one".