42453251 has 6 divisors (see below), whose sum is σ = 42778260. Its totient is φ = 42129396.

The previous prime is 42453247. The next prime is 42453253. The reversal of 42453251 is 15235424.

It is a happy number.

It is not a de Polignac number, because 42453251 - 2² = 42453247 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 42453251.

It is not an unprimeable number, because it can be changed into a prime (42453253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86930 + ... + 87416.

It is an arithmetic number, because the mean of its divisors is an integer number (7129710).

Almost surely, 2^42453251 is an apocalyptic number.

42453251 is a deficient number, since it is larger than the sum of its proper divisors (325009).

42453251 is an frugal number, since it uses more digits than its factorization.

42453251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 666 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 42453251 is about 6515.6159340465. The cubic root of 42453251 is about 348.8486000503.

Adding to 42453251 its reverse (15235424), we get a palindrome (57688675).

The spelling of 42453251 in words is "forty-two million, four hundred fifty-three thousand, two hundred fifty-one".