42505398 has 40 divisors (see below), whose sum is σ = 102575088. Its totient is φ = 13077936.

The previous prime is 42505381. The next prime is 42505427. The reversal of 42505398 is 89350524.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 7986 + ... + 12197.

Almost surely, 2^42505398 is an apocalyptic number.

42505398 is an abundant number, since it is smaller than the sum of its proper divisors (60069690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42505398 is a wasteful number, since it uses less digits than its factorization.

42505398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20210 (or 20201 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 42505398 is about 6519.6163997585. The cubic root of 42505398 is about 348.9913764313.

The spelling of 42505398 in words is "forty-two million, five hundred five thousand, three hundred ninety-eight".