102006542 has 8 divisors (see below), whose sum is σ = 166919832. Its totient is φ = 46366600.

The previous prime is 102006539. The next prime is 102006557. The reversal of 102006542 is 245600201.

It is a happy number.

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

It is a super-2 number, since 2×102006542² = 20810669221595528, which contains 22 as substring.

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, 2318309 + ... + 2318352.

It is an arithmetic number, because the mean of its divisors is an integer number (20864979).

Almost surely, 2^102006542 is an apocalyptic number.

102006542 is a deficient number, since it is larger than the sum of its proper divisors (64913290).

102006542 is a wasteful number, since it uses less digits than its factorization.

102006542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636674.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102006542 is about 10099.8288104304. The cubic root of 102006542 is about 467.2428616333.

Adding to 102006542 its reverse (245600201), we get a palindrome (347606743).

The spelling of 102006542 in words is "one hundred two million, six thousand, five hundred forty-two".