142463891 has 4 divisors (see below), whose sum is σ = 142488984. Its totient is φ = 142438800.

The previous prime is 142463873. The next prime is 142463897. The reversal of 142463891 is 198364241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198364241 = 599 ⋅331159.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142463891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142463897) 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, 476 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (35622246).

Almost surely, 2^142463891 is an apocalyptic number.

142463891 is a deficient number, since it is larger than the sum of its proper divisors (25093).

142463891 is an equidigital number, since it uses as much as digits as its factorization.

142463891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25092.

The product of its digits is 41472, while the sum is 38.

The square root of 142463891 is about 11935.8238509120. The cubic root of 142463891 is about 522.2778414999.

The spelling of 142463891 in words is "one hundred forty-two million, four hundred sixty-three thousand, eight hundred ninety-one".