102020772 has 24 divisors (see below), whose sum is σ = 272055616. Its totient is φ = 29148768.

The previous prime is 102020771. The next prime is 102020777. The reversal of 102020772 is 277020201.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (102020771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607183 + ... + 607350.

Almost surely, 2^102020772 is an apocalyptic number.

102020772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102020772 is an abundant number, since it is smaller than the sum of its proper divisors (170034844).

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

102020772 is a wasteful number, since it uses less digits than its factorization.

102020772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214547 (or 1214545 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 102020772 is about 10100.5332532496. The cubic root of 102020772 is about 467.2645875495.

Adding to 102020772 its reverse (277020201), we get a palindrome (379040973).

The spelling of 102020772 in words is "one hundred two million, twenty thousand, seven hundred seventy-two".