425245621 has 2 divisors, whose sum is σ = 425245622. Its totient is φ = 425245620.

The previous prime is 425245609. The next prime is 425245651. The reversal of 425245621 is 126542524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360620100 + 64625521 = 18990^2 + 8039^2 .

It is a cyclic number.

It is not a de Polignac number, because 425245621 - 2⁷ = 425245493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425245651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212622810 + 212622811.

It is an arithmetic number, because the mean of its divisors is an integer number (212622811).

Almost surely, 2^425245621 is an apocalyptic number.

It is an amenable number.

425245621 is a deficient number, since it is larger than the sum of its proper divisors (1).

425245621 is an equidigital number, since it uses as much as digits as its factorization.

425245621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19200, while the sum is 31.

The square root of 425245621 is about 20621.4844519011. The cubic root of 425245621 is about 751.9921090211.

The spelling of 425245621 in words is "four hundred twenty-five million, two hundred forty-five thousand, six hundred twenty-one".