102124405 has 8 divisors (see below), whose sum is σ = 122697432. Its totient is φ = 81600768.

The previous prime is 102124381. The next prime is 102124409. The reversal of 102124405 is 504421201.

It can be written as a sum of positive squares in 4 ways, for example, as 51969681 + 50154724 = 7209^2 + 7082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102124405 - 2¹⁵ = 102091637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102124409) 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, 7632 + ... + 16201.

It is an arithmetic number, because the mean of its divisors is an integer number (15337179).

Almost surely, 2^102124405 is an apocalyptic number.

It is an amenable number.

102124405 is a deficient number, since it is larger than the sum of its proper divisors (20573027).

102124405 is an equidigital number, since it uses as much as digits as its factorization.

102124405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24695.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 102124405 is about 10105.6620268046. The cubic root of 102124405 is about 467.4227502546.

Adding to 102124405 its reverse (504421201), we get a palindrome (606545606).

The spelling of 102124405 in words is "one hundred two million, one hundred twenty-four thousand, four hundred five".