425311261 has 4 divisors (see below), whose sum is σ = 426382972. Its totient is φ = 424239552.

The previous prime is 425311247. The next prime is 425311277. The reversal of 425311261 is 162113524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 292923225 + 132388036 = 17115^2 + 11506^2 .

It is a cyclic number.

It is not a de Polignac number, because 425311261 - 2⁹ = 425310749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425311241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535260 + ... + 536053.

It is an arithmetic number, because the mean of its divisors is an integer number (106595743).

Almost surely, 2^425311261 is an apocalyptic number.

It is an amenable number.

425311261 is a deficient number, since it is larger than the sum of its proper divisors (1071711).

425311261 is a wasteful number, since it uses less digits than its factorization.

425311261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071710.

The product of its digits is 1440, while the sum is 25.

The square root of 425311261 is about 20623.0759344963. The cubic root of 425311261 is about 752.0307989923.

Adding to 425311261 its reverse (162113524), we get a palindrome (587424785).

The spelling of 425311261 in words is "four hundred twenty-five million, three hundred eleven thousand, two hundred sixty-one".