425138381 has 4 divisors (see below), whose sum is σ = 425550972. Its totient is φ = 424725792.

The previous prime is 425138353. The next prime is 425138401. The reversal of 425138381 is 183831524.

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 417548356 + 7590025 = 20434^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 425138381 - 2⁶ = 425138317 is a prime.

It is a super-2 number, since 2×425138381² = 361485285998602322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425138081) 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, 204746 + ... + 206811.

It is an arithmetic number, because the mean of its divisors is an integer number (106387743).

Almost surely, 2^425138381 is an apocalyptic number.

It is an amenable number.

425138381 is a deficient number, since it is larger than the sum of its proper divisors (412591).

425138381 is a wasteful number, since it uses less digits than its factorization.

425138381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412590.

The product of its digits is 23040, while the sum is 35.

The square root of 425138381 is about 20618.8840871663. The cubic root of 425138381 is about 751.9288903307.

The spelling of 425138381 in words is "four hundred twenty-five million, one hundred thirty-eight thousand, three hundred eighty-one".