142549807 has 4 divisors (see below), whose sum is σ = 145239480. Its totient is φ = 139860136.

The previous prime is 142549793. The next prime is 142549831. The reversal of 142549807 is 708945241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142549807 - 2⁷ = 142549679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142549807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142549507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344757 + ... + 1344862.

It is an arithmetic number, because the mean of its divisors is an integer number (36309870).

Almost surely, 2^142549807 is an apocalyptic number.

142549807 is a deficient number, since it is larger than the sum of its proper divisors (2689673).

142549807 is an equidigital number, since it uses as much as digits as its factorization.

142549807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689672.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 142549807 is about 11939.4223897138. The cubic root of 142549807 is about 522.3828108021.

The spelling of 142549807 in words is "one hundred forty-two million, five hundred forty-nine thousand, eight hundred seven".