102749542 has 8 divisors (see below), whose sum is σ = 176142096. Its totient is φ = 44035512.

The previous prime is 102749519. The next prime is 102749551. The reversal of 102749542 is 245947201.

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 = 102749498 and 102749507.

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, 3669613 + ... + 3669640.

It is an arithmetic number, because the mean of its divisors is an integer number (22017762).

Almost surely, 2^102749542 is an apocalyptic number.

102749542 is a deficient number, since it is larger than the sum of its proper divisors (73392554).

102749542 is an equidigital number, since it uses as much as digits as its factorization.

102749542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7339262.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 102749542 is about 10136.5448748575. The cubic root of 102749542 is about 468.3745601287.

The spelling of 102749542 in words is "one hundred two million, seven hundred forty-nine thousand, five hundred forty-two".