102020404 has 6 divisors (see below), whose sum is σ = 178535714. Its totient is φ = 51010200.

The previous prime is 102020377. The next prime is 102020407. The reversal of 102020404 is 404020201.

It can be written as a sum of positive squares in only one way, i.e., 102010000 + 10404 = 10100^2 + 102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752547 + ... + 12752554.

Almost surely, 2^102020404 is an apocalyptic number.

It is an amenable number.

102020404 is a deficient number, since it is larger than the sum of its proper divisors (76515310).

102020404 is a wasteful number, since it uses less digits than its factorization.

102020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505105 (or 25505103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 102020404 is about 10100.5150363731. The cubic root of 102020404 is about 467.2640257242.

Adding to 102020404 its reverse (404020201), we get a palindrome (506040605).

The spelling of 102020404 in words is "one hundred two million, twenty thousand, four hundred four".