42160251 has 8 divisors (see below), whose sum is σ = 64244224. Its totient is φ = 24091560.

The previous prime is 42160249. The next prime is 42160267. The reversal of 42160251 is 15206124.

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

It is not a de Polignac number, because 42160251 - 2¹ = 42160249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2007631 = 42160251 / (4 + 2 + 1 + 6 + 0 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120251) 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, 1003795 + ... + 1003836.

It is an arithmetic number, because the mean of its divisors is an integer number (8030528).

Almost surely, 2^42160251 is an apocalyptic number.

42160251 is a deficient number, since it is larger than the sum of its proper divisors (22083973).

42160251 is a wasteful number, since it uses less digits than its factorization.

42160251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007641.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 42160251 is about 6493.0925605600. The cubic root of 42160251 is about 348.0441960648.

Adding to 42160251 its reverse (15206124), we get a palindrome (57366375).

The spelling of 42160251 in words is "forty-two million, one hundred sixty thousand, two hundred fifty-one".