3121420457 has 2 divisors, whose sum is σ = 3121420458. Its totient is φ = 3121420456.

The previous prime is 3121420427. The next prime is 3121420493. The reversal of 3121420457 is 7540241213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2248277056 + 873143401 = 47416^2 + 29549^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121420457 - 2²⁶ = 3054311593 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121420427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560710228 + 1560710229.

It is an arithmetic number, because the mean of its divisors is an integer number (1560710229).

Almost surely, 2^3121420457 is an apocalyptic number.

It is an amenable number.

3121420457 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121420457 is an equidigital number, since it uses as much as digits as its factorization.

3121420457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 3121420457 is about 55869.6738580064. The cubic root of 3121420457 is about 1461.4504346464.

The spelling of 3121420457 in words is "three billion, one hundred twenty-one million, four hundred twenty thousand, four hundred fifty-seven".