426644261 has 2 divisors, whose sum is σ = 426644262. Its totient is φ = 426644260.

The previous prime is 426644233. The next prime is 426644287. The reversal of 426644261 is 162446624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399760036 + 26884225 = 19994^2 + 5185^2 .

It is a cyclic number.

It is not a de Polignac number, because 426644261 - 2²² = 422449957 is a prime.

It is a super-2 number, since 2×426644261² = 364050650888472242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426644761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213322130 + 213322131.

It is an arithmetic number, because the mean of its divisors is an integer number (213322131).

Almost surely, 2^426644261 is an apocalyptic number.

It is an amenable number.

426644261 is a deficient number, since it is larger than the sum of its proper divisors (1).

426644261 is an equidigital number, since it uses as much as digits as its factorization.

426644261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 35.

The square root of 426644261 is about 20655.3688178159. The cubic root of 426644261 is about 752.8156450369.

The spelling of 426644261 in words is "four hundred twenty-six million, six hundred forty-four thousand, two hundred sixty-one".