42440253 has 8 divisors (see below), whose sum is σ = 58538400. Its totient is φ = 27317808.

The previous prime is 42440249. The next prime is 42440257. The reversal of 42440253 is 35204424.

It is an interprime number because it is at equal distance from previous prime (42440249) and next prime (42440257).

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

It is not a de Polignac number, because 42440253 - 2² = 42440249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440257) 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, 243823 + ... + 243996.

It is an arithmetic number, because the mean of its divisors is an integer number (7317300).

Almost surely, 2^42440253 is an apocalyptic number.

It is an amenable number.

42440253 is a deficient number, since it is larger than the sum of its proper divisors (16098147).

42440253 is a wasteful number, since it uses less digits than its factorization.

42440253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487851.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 42440253 is about 6514.6184078578. The cubic root of 42440253 is about 348.8129938495.

Adding to 42440253 its reverse (35204424), we get a palindrome (77644677).

The spelling of 42440253 in words is "forty-two million, four hundred forty thousand, two hundred fifty-three".