142720787 has 16 divisors (see below), whose sum is σ = 158982912. Its totient is φ = 127031520.

The previous prime is 142720783. The next prime is 142720813. The reversal of 142720787 is 787027241.

It is a happy number.

It is not a de Polignac number, because 142720787 - 2² = 142720783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142720787.

It is not an unprimeable number, because it can be changed into a prime (142720783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144698 + ... + 145680.

It is an arithmetic number, because the mean of its divisors is an integer number (9936432).

Almost surely, 2^142720787 is an apocalyptic number.

142720787 is a deficient number, since it is larger than the sum of its proper divisors (16262125).

142720787 is a wasteful number, since it uses less digits than its factorization.

142720787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 142720787 is about 11946.5805567953. The cubic root of 142720787 is about 522.5915830399.

The spelling of 142720787 in words is "one hundred forty-two million, seven hundred twenty thousand, seven hundred eighty-seven".