142491087 has 6 divisors (see below), whose sum is σ = 205820472. Its totient is φ = 94994052.

The previous prime is 142491073. The next prime is 142491133. The reversal of 142491087 is 780194241.

It is not a de Polignac number, because 142491087 - 2⁴ = 142491071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142491017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7916163 + ... + 7916180.

It is an arithmetic number, because the mean of its divisors is an integer number (34303412).

Almost surely, 2^142491087 is an apocalyptic number.

142491087 is a deficient number, since it is larger than the sum of its proper divisors (63329385).

142491087 is a wasteful number, since it uses less digits than its factorization.

142491087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832349 (or 15832346 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 142491087 is about 11936.9630559871. The cubic root of 142491087 is about 522.3110732293.

The spelling of 142491087 in words is "one hundred forty-two million, four hundred ninety-one thousand, eighty-seven".