2102741257 has 2 divisors, whose sum is σ = 2102741258. Its totient is φ = 2102741256.

The previous prime is 2102741243. The next prime is 2102741269. The reversal of 2102741257 is 7521472012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1373147136 + 729594121 = 37056^2 + 27011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102741257 - 2²³ = 2094352649 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102741227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051370628 + 1051370629.

It is an arithmetic number, because the mean of its divisors is an integer number (1051370629).

Almost surely, 2^2102741257 is an apocalyptic number.

It is an amenable number.

2102741257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102741257 is an equidigital number, since it uses as much as digits as its factorization.

2102741257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2102741257 is about 45855.6567611892. The cubic root of 2102741257 is about 1281.1361285212.

The spelling of 2102741257 in words is "two billion, one hundred two million, seven hundred forty-one thousand, two hundred fifty-seven".