2957861 has 2 divisors, whose sum is σ = 2957862. Its totient is φ = 2957860.

The previous prime is 2957833. The next prime is 2957873. The reversal of 2957861 is 1687592.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2856100 + 101761 = 1690^2 + 319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2957861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2957831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1478930 + 1478931.

It is an arithmetic number, because the mean of its divisors is an integer number (1478931).

2^2957861 is an apocalyptic number.

It is an amenable number.

2957861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2957861 is an equidigital number, since it uses as much as digits as its factorization.

2957861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 2957861 is about 1719.8433068161. The cubic root of 2957861 is about 143.5464931277.

The spelling of 2957861 in words is "two million, nine hundred fifty-seven thousand, eight hundred sixty-one".