426121291 has 4 divisors (see below), whose sum is σ = 430514392. Its totient is φ = 421728192.

The previous prime is 426121277. The next prime is 426121301. The reversal of 426121291 is 192121624.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426121291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196405 + ... + 2196598.

It is an arithmetic number, because the mean of its divisors is an integer number (107628598).

Almost surely, 2^426121291 is an apocalyptic number.

426121291 is a deficient number, since it is larger than the sum of its proper divisors (4393101).

426121291 is an equidigital number, since it uses as much as digits as its factorization.

426121291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393100.

The product of its digits is 1728, while the sum is 28.

The square root of 426121291 is about 20642.7055155084. The cubic root of 426121291 is about 752.5079249946.

It can be divided in two parts, 4261 and 21291, that added together give a palindrome (25552).

The spelling of 426121291 in words is "four hundred twenty-six million, one hundred twenty-one thousand, two hundred ninety-one".