42402502 has 4 divisors (see below), whose sum is σ = 63603756. Its totient is φ = 21201250.

The previous prime is 42402499. The next prime is 42402523. The reversal of 42402502 is 20520424.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42402502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600624 + ... + 10600627.

It is an arithmetic number, because the mean of its divisors is an integer number (15900939).

Almost surely, 2^42402502 is an apocalyptic number.

42402502 is a deficient number, since it is larger than the sum of its proper divisors (21201254).

42402502 is a wasteful number, since it uses less digits than its factorization.

42402502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21201253.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42402502 is about 6511.7203564035. The cubic root of 42402502 is about 348.7095390340.

Adding to 42402502 its reverse (20520424), we get a palindrome (62922926).

The spelling of 42402502 in words is "forty-two million, four hundred two thousand, five hundred two".