425901521 has 2 divisors, whose sum is σ = 425901522. Its totient is φ = 425901520.

The previous prime is 425901503. The next prime is 425901533. The reversal of 425901521 is 125109524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342435025 + 83466496 = 18505^2 + 9136^2 .

It is a cyclic number.

It is not a de Polignac number, because 425901521 - 2¹⁴ = 425885137 is a prime.

It is a super-3 number, since 3×425901521³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425901551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212950760 + 212950761.

It is an arithmetic number, because the mean of its divisors is an integer number (212950761).

Almost surely, 2^425901521 is an apocalyptic number.

It is an amenable number.

425901521 is a deficient number, since it is larger than the sum of its proper divisors (1).

425901521 is an equidigital number, since it uses as much as digits as its factorization.

425901521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 425901521 is about 20637.3816410900. The cubic root of 425901521 is about 752.3785353041.

The spelling of 425901521 in words is "four hundred twenty-five million, nine hundred one thousand, five hundred twenty-one".