102542020 has 48 divisors (see below), whose sum is σ = 246677760. Its totient is φ = 35074944.

The previous prime is 102542009. The next prime is 102542021. The reversal of 102542020 is 20245201.

It is a junction number, because it is equal to n+sod(n) for n = 102541985 and 102542003.

It is not an unprimeable number, because it can be changed into a prime (102542021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111121 + ... + 112039.

It is an arithmetic number, because the mean of its divisors is an integer number (5139120).

Almost surely, 2^102542020 is an apocalyptic number.

102542020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102542020 is an abundant number, since it is smaller than the sum of its proper divisors (144135740).

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

102542020 is a wasteful number, since it uses less digits than its factorization.

102542020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 102542020 is about 10126.3033728997. The cubic root of 102542020 is about 468.0590241381.

Adding to 102542020 its reverse (20245201), we get a palindrome (122787221).

The spelling of 102542020 in words is "one hundred two million, five hundred forty-two thousand, twenty".