42450531 has 8 divisors (see below), whose sum is σ = 56697600. Its totient is φ = 28251912.

The previous prime is 42450517. The next prime is 42450533. The reversal of 42450531 is 13505424.

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

It is not a de Polignac number, because 42450531 - 2¹⁵ = 42417763 is a prime.

It is a super-2 number, since 2×42450531² = 3604095164363922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42450533) 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, 10015 + ... + 13608.

It is an arithmetic number, because the mean of its divisors is an integer number (7087200).

Almost surely, 2^42450531 is an apocalyptic number.

42450531 is a deficient number, since it is larger than the sum of its proper divisors (14247069).

42450531 is a wasteful number, since it uses less digits than its factorization.

42450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24225.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42450531 is about 6515.4072013958. The cubic root of 42450531 is about 348.8411495926.

Adding to 42450531 its reverse (13505424), we get a palindrome (55955955).

The spelling of 42450531 in words is "forty-two million, four hundred fifty thousand, five hundred thirty-one".