102747042 has 20 divisors (see below), whose sum is σ = 230229846. Its totient is φ = 34248960.

The previous prime is 102747023. The next prime is 102747059. The reversal of 102747042 is 240747201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 48149721 = 7389^2 + 6939^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 102746997 and 102747015.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 316959 + ... + 317282.

Almost surely, 2^102747042 is an apocalyptic number.

102747042 is an abundant number, since it is smaller than the sum of its proper divisors (127482804).

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

102747042 is an equidigital number, since it uses as much as digits as its factorization.

102747042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634255 (or 634246 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 102747042 is about 10136.4215579266. The cubic root of 102747042 is about 468.3707614227.

The spelling of 102747042 in words is "one hundred two million, seven hundred forty-seven thousand, forty-two".