42451800 has 48 divisors (see below), whose sum is σ = 131602440. Its totient is φ = 11320320.

The previous prime is 42451789. The next prime is 42451807. The reversal of 42451800 is 815424.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34777 + ... + 35976.

Almost surely, 2^42451800 is an apocalyptic number.

42451800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42451800 is an abundant number, since it is smaller than the sum of its proper divisors (89150640).

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

42451800 is a wasteful number, since it uses less digits than its factorization.

42451800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70772 (or 70763 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 42451800 is about 6515.5045852182. The cubic root of 42451800 is about 348.8446255994.

The spelling of 42451800 in words is "forty-two million, four hundred fifty-one thousand, eight hundred".