42653251 has 4 divisors (see below), whose sum is σ = 42671272. Its totient is φ = 42635232.

The previous prime is 42653239. The next prime is 42653257. The reversal of 42653251 is 15235624.

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-42653251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42653257) 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, 4806 + ... + 10411.

It is an arithmetic number, because the mean of its divisors is an integer number (10667818).

Almost surely, 2^42653251 is an apocalyptic number.

42653251 is a deficient number, since it is larger than the sum of its proper divisors (18021).

42653251 is a wasteful number, since it uses less digits than its factorization.

42653251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020.

The product of its digits is 7200, while the sum is 28.

The square root of 42653251 is about 6530.9456436262. The cubic root of 42653251 is about 349.3955581043.

Adding to 42653251 its reverse (15235624), we get a palindrome (57888875).

The spelling of 42653251 in words is "forty-two million, six hundred fifty-three thousand, two hundred fifty-one".