42424251 has 8 divisors (see below), whose sum is σ = 56664384. Its totient is φ = 28233480.

The previous prime is 42424243. The next prime is 42424279. The reversal of 42424251 is 15242424.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42424251 - 2³ = 42424243 is a prime.

It is a super-2 number, since 2×42424251² = 3599634145822002, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 10285 + ... + 13806.

It is an arithmetic number, because the mean of its divisors is an integer number (7083048).

Almost surely, 2^42424251 is an apocalyptic number.

42424251 is a deficient number, since it is larger than the sum of its proper divisors (14240133).

42424251 is a wasteful number, since it uses less digits than its factorization.

42424251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24681.

The product of its digits is 2560, while the sum is 24.

The square root of 42424251 is about 6513.3901311068. The cubic root of 42424251 is about 348.7691486255.

Adding to 42424251 its reverse (15242424), we get a palindrome (57666675).

The spelling of 42424251 in words is "forty-two million, four hundred twenty-four thousand, two hundred fifty-one".