49991142 has 8 divisors (see below), whose sum is σ = 99982296. Its totient is φ = 16663712.

The previous prime is 49991141. The next prime is 49991143. The reversal of 49991142 is 24119994.

It is an interprime number because it is at equal distance from previous prime (49991141) and next prime (49991143).

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

49991142 is an admirable number.

It is a super-2 number, since 2×49991142² = 4998228556928328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49991142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49991141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4165923 + ... + 4165934.

It is an arithmetic number, because the mean of its divisors is an integer number (12497787).

Almost surely, 2^49991142 is an apocalyptic number.

49991142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49991142 is a wasteful number, since it uses less digits than its factorization.

49991142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331862.

The product of its digits is 23328, while the sum is 39.

The square root of 49991142 is about 7070.4414289350. The cubic root of 49991142 is about 368.3813931452.

The spelling of 49991142 in words is "forty-nine million, nine hundred ninety-one thousand, one hundred forty-two".