42151251 has 16 divisors (see below), whose sum is σ = 57919904. Its totient is φ = 27247104.

The previous prime is 42151231. The next prime is 42151261. The reversal of 42151251 is 15215124.

It is not a de Polignac number, because 42151251 - 2⁹ = 42150739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42151231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47625 + ... + 48501.

It is an arithmetic number, because the mean of its divisors is an integer number (3619994).

Almost surely, 2^42151251 is an apocalyptic number.

42151251 is a deficient number, since it is larger than the sum of its proper divisors (15768653).

42151251 is a wasteful number, since it uses less digits than its factorization.

42151251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350.

The product of its digits is 400, while the sum is 21.

The square root of 42151251 is about 6492.3994793913. The cubic root of 42151251 is about 348.0194284965.

Adding to 42151251 its reverse (15215124), we get a palindrome (57366375).

The spelling of 42151251 in words is "forty-two million, one hundred fifty-one thousand, two hundred fifty-one".