42261481 has 2 divisors, whose sum is σ = 42261482. Its totient is φ = 42261480.

The previous prime is 42261467. The next prime is 42261487. The reversal of 42261481 is 18416224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30151081 + 12110400 = 5491^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 42261481 - 2⁷ = 42261353 is a prime.

It is a super-2 number, since 2×42261481² = 3572065552626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42261487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130740 + 21130741.

It is an arithmetic number, because the mean of its divisors is an integer number (21130741).

Almost surely, 2^42261481 is an apocalyptic number.

It is an amenable number.

42261481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42261481 is an equidigital number, since it uses as much as digits as its factorization.

42261481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 28.

The square root of 42261481 is about 6500.8830938573. The cubic root of 42261481 is about 348.3225336934.

The spelling of 42261481 in words is "forty-two million, two hundred sixty-one thousand, four hundred eighty-one".