142907805 has 24 divisors (see below), whose sum is σ = 249239328. Its totient is φ = 75746016.

The previous prime is 142907803. The next prime is 142907839. The reversal of 142907805 is 508709241.

It is not a de Polignac number, because 142907805 - 2¹ = 142907803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142907805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142907803) 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, 2407 + ... + 17076.

It is an arithmetic number, because the mean of its divisors is an integer number (10384972).

Almost surely, 2^142907805 is an apocalyptic number.

142907805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142907805 is a deficient number, since it is larger than the sum of its proper divisors (106331523).

142907805 is a wasteful number, since it uses less digits than its factorization.

142907805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19657 (or 19654 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 142907805 is about 11954.4052549677. The cubic root of 142907805 is about 522.8197473607.

The spelling of 142907805 in words is "one hundred forty-two million, nine hundred seven thousand, eight hundred five".