142542840 has 96 divisors (see below), whose sum is σ = 470085840. Its totient is φ = 34552320.

The previous prime is 142542839. The next prime is 142542847. The reversal of 142542840 is 48245241.

It is a super-2 number, since 2×142542840² = 40636922470531200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 142542798 and 142542807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142542847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9612 + ... + 19428.

Almost surely, 2^142542840 is an apocalyptic number.

142542840 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 142542840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235042920).

142542840 is an abundant number, since it is smaller than the sum of its proper divisors (327543000).

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

142542840 is a wasteful number, since it uses less digits than its factorization.

142542840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853 (or 9838 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

The square root of 142542840 is about 11939.1306216156. The cubic root of 142542840 is about 522.3743003257.

The spelling of 142542840 in words is "one hundred forty-two million, five hundred forty-two thousand, eight hundred forty".