42502451 has 2 divisors, whose sum is σ = 42502452. Its totient is φ = 42502450.

The previous prime is 42502417. The next prime is 42502463. The reversal of 42502451 is 15420524.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42502451 - 2⁶ = 42502387 is a prime.

It is not a weakly prime, because it can be changed into another prime (42508451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21251225 + 21251226.

It is an arithmetic number, because the mean of its divisors is an integer number (21251226).

Almost surely, 2^42502451 is an apocalyptic number.

42502451 is a deficient number, since it is larger than the sum of its proper divisors (1).

42502451 is an equidigital number, since it uses as much as digits as its factorization.

42502451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42502451 is about 6519.3903856112. The cubic root of 42502451 is about 348.9833107785.

Adding to 42502451 its reverse (15420524), we get a palindrome (57922975).

The spelling of 42502451 in words is "forty-two million, five hundred two thousand, four hundred fifty-one".