142821700 has 72 divisors (see below), whose sum is σ = 355796672. Its totient is φ = 48746880.

The previous prime is 142821677. The next prime is 142821821. The reversal of 142821700 is 7128241.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260827 + ... + 261373.

Almost surely, 2^142821700 is an apocalyptic number.

142821700 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 142821700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177898336).

142821700 is an abundant number, since it is smaller than the sum of its proper divisors (212974972).

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

142821700 is a wasteful number, since it uses less digits than its factorization.

142821700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 142821700 is about 11950.8033202794. The cubic root of 142821700 is about 522.7147229157.

Adding to 142821700 its reverse (7128241), we get a palindrome (149949941).

The spelling of 142821700 in words is "one hundred forty-two million, eight hundred twenty-one thousand, seven hundred".