142617990 has 64 divisors (see below), whose sum is σ = 362903040. Its totient is φ = 35769600.

The previous prime is 142617977. The next prime is 142618037. The reversal of 142617990 is 99716241.

It is a Curzon number.

It is a congruent number.

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, 85242 + ... + 86898.

It is an arithmetic number, because the mean of its divisors is an integer number (5670360).

Almost surely, 2^142617990 is an apocalyptic number.

142617990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142617990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181451520).

142617990 is an abundant number, since it is smaller than the sum of its proper divisors (220285050).

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

142617990 is a wasteful number, since it uses less digits than its factorization.

142617990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 142617990 is about 11942.2774209947. The cubic root of 142617990 is about 522.4660845030.

The spelling of 142617990 in words is "one hundred forty-two million, six hundred seventeen thousand, nine hundred ninety".