142061640 has 128 divisors (see below), whose sum is σ = 491166720. Its totient is φ = 32198400.

The previous prime is 142061629. The next prime is 142061657. The reversal of 142061640 is 46160241.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 142061640.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109395 + ... + 110685.

It is an arithmetic number, because the mean of its divisors is an integer number (3837240).

Almost surely, 2^142061640 is an apocalyptic number.

142061640 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 142061640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245583360).

142061640 is an abundant number, since it is smaller than the sum of its proper divisors (349105080).

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

142061640 is a wasteful number, since it uses less digits than its factorization.

142061640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443 (or 1439 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 142061640 is about 11918.9613641458. The cubic root of 142061640 is about 521.7858225000.

The spelling of 142061640 in words is "one hundred forty-two million, sixty-one thousand, six hundred forty".