42251534 has 8 divisors (see below), whose sum is σ = 68252520. Its totient is φ = 19500696.

The previous prime is 42251513. The next prime is 42251549. The reversal of 42251534 is 43515224.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 1625059 = 42251534 / (4 + 2 + 2 + 5 + 1 + 5 + 3 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812504 + ... + 812555.

It is an arithmetic number, because the mean of its divisors is an integer number (8531565).

Almost surely, 2^42251534 is an apocalyptic number.

42251534 is a deficient number, since it is larger than the sum of its proper divisors (26000986).

42251534 is a wasteful number, since it uses less digits than its factorization.

42251534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625074.

The product of its digits is 4800, while the sum is 26.

The square root of 42251534 is about 6500.1179989289. The cubic root of 42251534 is about 348.2952035571.

Adding to 42251534 its reverse (43515224), we get a palindrome (85766758).

The spelling of 42251534 in words is "forty-two million, two hundred fifty-one thousand, five hundred thirty-four".