102505542 has 8 divisors (see below), whose sum is σ = 205011096. Its totient is φ = 34168512.

The previous prime is 102505541. The next prime is 102505547. The reversal of 102505542 is 245505201.

It is a happy number.

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

102505542 is an admirable number.

It is a super-2 number, since 2×102505542² = 21014772281427528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102505541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8542123 + ... + 8542134.

It is an arithmetic number, because the mean of its divisors is an integer number (25626387).

Almost surely, 2^102505542 is an apocalyptic number.

102505542 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.

102505542 is a wasteful number, since it uses less digits than its factorization.

102505542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17084262.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 102505542 is about 10124.5020618300. The cubic root of 102505542 is about 468.0035155701.

The spelling of 102505542 in words is "one hundred two million, five hundred five thousand, five hundred forty-two".