185749642 has 8 divisors (see below), whose sum is σ = 300057156. Its totient is φ = 85730592.

The previous prime is 185749609. The next prime is 185749651. The reversal of 185749642 is 246947581.

It is a Cunningham number, because it is equal to 13629²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 185749641 + 1 = 13629^2 + 1^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 185749592 and 185749601.

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, 3572083 + ... + 3572134.

Almost surely, 2^185749642 is an apocalyptic number.

185749642 is a deficient number, since it is larger than the sum of its proper divisors (114307514).

185749642 is a wasteful number, since it uses less digits than its factorization.

185749642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144232.

The product of its digits is 483840, while the sum is 46.

The square root of 185749642 is about 13629.0000366865. Note that the first 4 decimals coincide. The cubic root of 185749642 is about 570.5705193623.

The spelling of 185749642 in words is "one hundred eighty-five million, seven hundred forty-nine thousand, six hundred forty-two".