102040621 has 6 divisors (see below), whose sum is σ = 107694222. Its totient is φ = 96669720.

The previous prime is 102040607. The next prime is 102040637. The reversal of 102040621 is 126040201.

It can be written as a sum of positive squares in only one way, i.e., 88454025 + 13586596 = 9405^2 + 3686^2 .

It is not a de Polignac number, because 102040621 - 2⁷ = 102040493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102040595 and 102040604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102040321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140970 + ... + 141691.

It is an arithmetic number, because the mean of its divisors is an integer number (17949037).

Almost surely, 2^102040621 is an apocalyptic number.

It is an amenable number.

102040621 is a deficient number, since it is larger than the sum of its proper divisors (5653601).

102040621 is an equidigital number, since it uses as much as digits as its factorization.

102040621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282699 (or 282680 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102040621 is about 10101.5157773475. The cubic root of 102040621 is about 467.2948890041.

Adding to 102040621 its reverse (126040201), we get a palindrome (228080822).

The spelling of 102040621 in words is "one hundred two million, forty thousand, six hundred twenty-one".