42501231 has 12 divisors (see below), whose sum is σ = 61451208. Its totient is φ = 28306224.

The previous prime is 42501209. The next prime is 42501253. The reversal of 42501231 is 13210524.

It is an interprime number because it is at equal distance from previous prime (42501209) and next prime (42501253).

It is not a de Polignac number, because 42501231 - 2¹⁴ = 42484847 is a prime.

It is a super-2 number, since 2×42501231² = 3612709273030722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42505231) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11856 + ... + 15018.

It is an arithmetic number, because the mean of its divisors is an integer number (5120934).

Almost surely, 2^42501231 is an apocalyptic number.

42501231 is a deficient number, since it is larger than the sum of its proper divisors (18949977).

42501231 is a wasteful number, since it uses less digits than its factorization.

42501231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4659 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 42501231 is about 6519.2968179091. The cubic root of 42501231 is about 348.9799716478.

Adding to 42501231 its reverse (13210524), we get a palindrome (55711755).

The spelling of 42501231 in words is "forty-two million, five hundred one thousand, two hundred thirty-one".