406425557 has 2 divisors, whose sum is σ = 406425558. Its totient is φ = 406425556.

The previous prime is 406425553. The next prime is 406425583. The reversal of 406425557 is 755524604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392594596 + 13830961 = 19814^2 + 3719^2 .

It is a cyclic number.

It is not a de Polignac number, because 406425557 - 2² = 406425553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406425557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406425553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203212778 + 203212779.

It is an arithmetic number, because the mean of its divisors is an integer number (203212779).

Almost surely, 2^406425557 is an apocalyptic number.

It is an amenable number.

406425557 is a deficient number, since it is larger than the sum of its proper divisors (1).

406425557 is an equidigital number, since it uses as much as digits as its factorization.

406425557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 406425557 is about 20159.9989335317. The cubic root of 406425557 is about 740.7306862349.

The spelling of 406425557 in words is "four hundred six million, four hundred twenty-five thousand, five hundred fifty-seven".