42480251 has 4 divisors (see below), whose sum is σ = 46342104. Its totient is φ = 38618400.

The previous prime is 42480239. The next prime is 42480283. The reversal of 42480251 is 15208424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42480251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42480251.

It is not an unprimeable number, because it can be changed into a prime (42483251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930910 + ... + 1930931.

It is an arithmetic number, because the mean of its divisors is an integer number (11585526).

Almost surely, 2^42480251 is an apocalyptic number.

42480251 is a deficient number, since it is larger than the sum of its proper divisors (3861853).

42480251 is a wasteful number, since it uses less digits than its factorization.

42480251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861852.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 42480251 is about 6517.6875500441. The cubic root of 42480251 is about 348.9225395477.

Adding to 42480251 its reverse (15208424), we get a palindrome (57688675).

The spelling of 42480251 in words is "forty-two million, four hundred eighty thousand, two hundred fifty-one".