42051263 has 4 divisors (see below), whose sum is σ = 42092400. Its totient is φ = 42010128.

The previous prime is 42051239. The next prime is 42051271. The reversal of 42051263 is 36215024.

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

It is a cyclic number.

It is not a de Polignac number, because 42051263 - 2⁸ = 42051007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051223) 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, 18995 + ... + 21092.

It is an arithmetic number, because the mean of its divisors is an integer number (10523100).

Almost surely, 2^42051263 is an apocalyptic number.

42051263 is a deficient number, since it is larger than the sum of its proper divisors (41137).

42051263 is a wasteful number, since it uses less digits than its factorization.

42051263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41136.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42051263 is about 6484.6945186339. The cubic root of 42051263 is about 347.7440288584.

Adding to 42051263 its reverse (36215024), we get a palindrome (78266287).

The spelling of 42051263 in words is "forty-two million, fifty-one thousand, two hundred sixty-three".