142138485 has 12 divisors (see below), whose sum is σ = 246373452. Its totient is φ = 75807168.

The previous prime is 142138471. The next prime is 142138501. The reversal of 142138485 is 584831241.

142138485 is a `hidden beast` number, since 1 + 42 + 138 + 485 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60000516 + 82137969 = 7746^2 + 9063^2 .

It is not a de Polignac number, because 142138485 - 2⁵ = 142138453 is a prime.

It is a super-3 number, since 3×142138485³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1579272 + ... + 1579361.

It is an arithmetic number, because the mean of its divisors is an integer number (20531121).

Almost surely, 2^142138485 is an apocalyptic number.

142138485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142138485 is a deficient number, since it is larger than the sum of its proper divisors (104234967).

142138485 is a wasteful number, since it uses less digits than its factorization.

142138485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158644 (or 3158641 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 142138485 is about 11922.1845733070. The cubic root of 142138485 is about 521.8798882495.

The spelling of 142138485 in words is "one hundred forty-two million, one hundred thirty-eight thousand, four hundred eighty-five".