42412261 has 2 divisors, whose sum is σ = 42412262. Its totient is φ = 42412260.

The previous prime is 42412241. The next prime is 42412267. The reversal of 42412261 is 16221424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25553025 + 16859236 = 5055^2 + 4106^2 .

It is a cyclic number.

It is not a de Polignac number, because 42412261 - 2⁷ = 42412133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42412267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21206130 + 21206131.

It is an arithmetic number, because the mean of its divisors is an integer number (21206131).

Almost surely, 2^42412261 is an apocalyptic number.

It is an amenable number.

42412261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42412261 is an equidigital number, since it uses as much as digits as its factorization.

42412261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 42412261 is about 6512.4696544399. The cubic root of 42412261 is about 348.7362889913.

Adding to 42412261 its reverse (16221424), we get a palindrome (58633685).

The spelling of 42412261 in words is "forty-two million, four hundred twelve thousand, two hundred sixty-one".