142187400 has 240 divisors, whose sum is σ = 505034640. Its totient is φ = 37065600.

The previous prime is 142187399. The next prime is 142187443. The reversal of 142187400 is 4781241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1085335 + ... + 1085465.

It is an arithmetic number, because the mean of its divisors is an integer number (2104311).

Almost surely, 2^142187400 is an apocalyptic number.

142187400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142187400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252517320).

142187400 is an abundant number, since it is smaller than the sum of its proper divisors (362847240).

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

142187400 is a wasteful number, since it uses less digits than its factorization.

142187400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 142187400 is about 11924.2358245717. The cubic root of 142187400 is about 521.9397473063.

The spelling of 142187400 in words is "one hundred forty-two million, one hundred eighty-seven thousand, four hundred".