142684487 has 4 divisors (see below), whose sum is σ = 155655816. Its totient is φ = 129713160.

The previous prime is 142684459. The next prime is 142684489. The reversal of 142684487 is 784486241.

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 142684487 - 2⁸ = 142684231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142684489) 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, 6485648 + ... + 6485669.

It is an arithmetic number, because the mean of its divisors is an integer number (38913954).

Almost surely, 2^142684487 is an apocalyptic number.

142684487 is a deficient number, since it is larger than the sum of its proper divisors (12971329).

142684487 is a wasteful number, since it uses less digits than its factorization.

142684487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12971328.

The product of its digits is 344064, while the sum is 44.

The square root of 142684487 is about 11945.0611969969. The cubic root of 142684487 is about 522.5472734866.

The spelling of 142684487 in words is "one hundred forty-two million, six hundred eighty-four thousand, four hundred eighty-seven".