426404251 has 64 divisors (see below), whose sum is σ = 595123200. Its totient is φ = 295612416.

The previous prime is 426404249. The next prime is 426404299. The reversal of 426404251 is 152404624.

It is a cyclic number.

It is not a de Polignac number, because 426404251 - 2¹ = 426404249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426404221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2615896 + ... + 2616058.

It is an arithmetic number, because the mean of its divisors is an integer number (9298800).

Almost surely, 2^426404251 is an apocalyptic number.

426404251 is a deficient number, since it is larger than the sum of its proper divisors (168718949).

426404251 is a wasteful number, since it uses less digits than its factorization.

426404251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 426404251 is about 20649.5581308657. The cubic root of 426404251 is about 752.6744523296.

Adding to 426404251 its reverse (152404624), we get a palindrome (578808875).

The spelling of 426404251 in words is "four hundred twenty-six million, four hundred four thousand, two hundred fifty-one".