42061231 has 8 divisors (see below), whose sum is σ = 44348400. Its totient is φ = 39781440.

The previous prime is 42061219. The next prime is 42061297. The reversal of 42061231 is 13216024.

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

It is not a de Polignac number, because 42061231 - 2¹⁵ = 42028463 is a prime.

It is a super-2 number, since 2×42061231² = 3538294306470722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42061199 and 42061208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42061211) 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, 13005 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (5543550).

Almost surely, 2^42061231 is an apocalyptic number.

42061231 is a deficient number, since it is larger than the sum of its proper divisors (2287169).

42061231 is a wasteful number, since it uses less digits than its factorization.

42061231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 42061231 is about 6485.4630520881. The cubic root of 42061231 is about 347.7715035673.

Adding to 42061231 its reverse (13216024), we get a palindrome (55277255).

The spelling of 42061231 in words is "forty-two million, sixty-one thousand, two hundred thirty-one".