47142742 has 4 divisors (see below), whose sum is σ = 70714116. Its totient is φ = 23571370.

The previous prime is 47142737. The next prime is 47142761. The reversal of 47142742 is 24724174.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11785684 + ... + 11785687.

It is an arithmetic number, because the mean of its divisors is an integer number (17678529).

Almost surely, 2^47142742 is an apocalyptic number.

47142742 is a deficient number, since it is larger than the sum of its proper divisors (23571374).

47142742 is a wasteful number, since it uses less digits than its factorization.

47142742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23571373.

The product of its digits is 12544, while the sum is 31.

The square root of 47142742 is about 6866.0572383283. The cubic root of 47142742 is about 361.2475799537.

The spelling of 47142742 in words is "forty-seven million, one hundred forty-two thousand, seven hundred forty-two".