425152781 has 2 divisors, whose sum is σ = 425152782. Its totient is φ = 425152780.

The previous prime is 425152753. The next prime is 425152807. The reversal of 425152781 is 187251524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424566025 + 586756 = 20605^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 425152781 - 2¹⁸ = 424890637 is a prime.

It is a super-2 number, since 2×425152781² = 361509774384067922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425152751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212576390 + 212576391.

It is an arithmetic number, because the mean of its divisors is an integer number (212576391).

Almost surely, 2^425152781 is an apocalyptic number.

It is an amenable number.

425152781 is a deficient number, since it is larger than the sum of its proper divisors (1).

425152781 is an equidigital number, since it uses as much as digits as its factorization.

425152781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 425152781 is about 20619.2332786648. The cubic root of 425152781 is about 751.9373798440.

The spelling of 425152781 in words is "four hundred twenty-five million, one hundred fifty-two thousand, seven hundred eighty-one".