142865856 has 280 divisors, whose sum is σ = 503545856. Its totient is φ = 39191040.

The previous prime is 142865851. The next prime is 142865869. The reversal of 142865856 is 658568241.

It is a super-2 number, since 2×142865856² = 40821305621225472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142865851) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1124865 + ... + 1124991.

Almost surely, 2^142865856 is an apocalyptic number.

142865856 is a gapful number since it is divisible by the number (16) 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 142865856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251772928).

142865856 is an abundant number, since it is smaller than the sum of its proper divisors (360680000).

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

142865856 is a wasteful number, since it uses less digits than its factorization.

142865856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 170 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 142865856 is about 11952.6505847030. The cubic root of 142865856 is about 522.7685863764.

The spelling of 142865856 in words is "one hundred forty-two million, eight hundred sixty-five thousand, eight hundred fifty-six".