42424261 has 4 divisors (see below), whose sum is σ = 46281024. Its totient is φ = 38567500.

The previous prime is 42424243. The next prime is 42424279. The reversal of 42424261 is 16242424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (42424243) and next prime (42424279).

It is a cyclic number.

It is not a de Polignac number, because 42424261 - 2¹³ = 42416069 is a prime.

It is a super-2 number, since 2×42424261² = 3599635842792242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42424201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928365 + ... + 1928386.

It is an arithmetic number, because the mean of its divisors is an integer number (11570256).

Almost surely, 2^42424261 is an apocalyptic number.

It is an amenable number.

42424261 is a deficient number, since it is larger than the sum of its proper divisors (3856763).

42424261 is a wasteful number, since it uses less digits than its factorization.

42424261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856762.

The product of its digits is 3072, while the sum is 25.

The square root of 42424261 is about 6513.3908987562. The cubic root of 42424261 is about 348.7691760288.

Adding to 42424261 its reverse (16242424), we get a palindrome (58666685).

The spelling of 42424261 in words is "forty-two million, four hundred twenty-four thousand, two hundred sixty-one".