42451000 has 32 divisors (see below), whose sum is σ = 99337680. Its totient is φ = 16980000.

The previous prime is 42450977. The next prime is 42451001. The reversal of 42451000 is 15424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20226 + ... + 22225.

Almost surely, 2^42451000 is an apocalyptic number.

42451000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42451000 is an abundant number, since it is smaller than the sum of its proper divisors (56886680).

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

42451000 is a wasteful number, since it uses less digits than its factorization.

42451000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42472 (or 42458 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 42451000 is about 6515.4431929071. The cubic root of 42451000 is about 348.8424342714.

Adding to 42451000 its reverse (15424), we get a palindrome (42466424).

The spelling of 42451000 in words is "forty-two million, four hundred fifty-one thousand".