425633261 has 16 divisors (see below), whose sum is σ = 447129600. Its totient is φ = 404647488.

The previous prime is 425633191. The next prime is 425633293. The reversal of 425633261 is 162336524.

It is a cyclic number.

It is not a de Polignac number, because 425633261 - 2¹⁰ = 425632237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425633161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599975 + ... + 600683.

It is an arithmetic number, because the mean of its divisors is an integer number (27945600).

Almost surely, 2^425633261 is an apocalyptic number.

It is an amenable number.

425633261 is a deficient number, since it is larger than the sum of its proper divisors (21496339).

425633261 is a wasteful number, since it uses less digits than its factorization.

425633261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its digits is 25920, while the sum is 32.

The square root of 425633261 is about 20630.8812463259. The cubic root of 425633261 is about 752.2205367633.

Adding to 425633261 its reverse (162336524), we get a palindrome (587969785).

The spelling of 425633261 in words is "four hundred twenty-five million, six hundred thirty-three thousand, two hundred sixty-one".