102020420 has 24 divisors (see below), whose sum is σ = 217180824. Its totient is φ = 40248576.

The previous prime is 102020419. The next prime is 102020447. The reversal of 102020420 is 24020201.

It can be written as a sum of positive squares in 4 ways, for example, as 91204 + 101929216 = 302^2 + 10096^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33479 + ... + 36398.

It is an arithmetic number, because the mean of its divisors is an integer number (9049201).

Almost surely, 2^102020420 is an apocalyptic number.

102020420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020420 is an abundant number, since it is smaller than the sum of its proper divisors (115160404).

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

102020420 is a wasteful number, since it uses less digits than its factorization.

102020420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69959 (or 69957 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 102020420 is about 10100.5158284119. The cubic root of 102020420 is about 467.2640501514.

Adding to 102020420 its reverse (24020201), we get a palindrome (126040621).

The spelling of 102020420 in words is "one hundred two million, twenty thousand, four hundred twenty".