142191494 has 8 divisors (see below), whose sum is σ = 213455088. Its totient is φ = 71039800.

The previous prime is 142191479. The next prime is 142191503. The reversal of 142191494 is 494191241.

142191494 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24722 + ... + 29925.

It is an arithmetic number, because the mean of its divisors is an integer number (26681886).

Almost surely, 2^142191494 is an apocalyptic number.

142191494 is a deficient number, since it is larger than the sum of its proper divisors (71263594).

142191494 is a wasteful number, since it uses less digits than its factorization.

142191494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55950.

The product of its digits is 10368, while the sum is 35.

The square root of 142191494 is about 11924.4074905213. The cubic root of 142191494 is about 521.9447566597.

The spelling of 142191494 in words is "one hundred forty-two million, one hundred ninety-one thousand, four hundred ninety-four".