102012455 has 4 divisors (see below), whose sum is σ = 122414952. Its totient is φ = 81609960.

The previous prime is 102012437. The next prime is 102012457. The reversal of 102012455 is 554210201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102012455 - 2¹⁴ = 101996071 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 (102012457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10201241 + ... + 10201250.

It is an arithmetic number, because the mean of its divisors is an integer number (30603738).

Almost surely, 2^102012455 is an apocalyptic number.

102012455 is a deficient number, since it is larger than the sum of its proper divisors (20402497).

102012455 is an equidigital number, since it uses as much as digits as its factorization.

102012455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20402496.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 102012455 is about 10100.1215339223. The cubic root of 102012455 is about 467.2518896610.

Adding to 102012455 its reverse (554210201), we get a palindrome (656222656).

The spelling of 102012455 in words is "one hundred two million, twelve thousand, four hundred fifty-five".