102402252245 has 4 divisors (see below), whose sum is σ = 122882702700. Its totient is φ = 81921801792.

The previous prime is 102402252233. The next prime is 102402252259. The reversal of 102402252245 is 542252204201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542252204201 = 29 ⋅18698351869.

It can be written as a sum of positive squares in 2 ways, for example, as 58924164049 + 43478088196 = 242743^2 + 208514^2 .

It is a cyclic number.

It is not a de Polignac number, because 102402252245 - 2¹² = 102402248149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10240225220 + ... + 10240225229.

It is an arithmetic number, because the mean of its divisors is an integer number (30720675675).

Almost surely, 2^102402252245 is an apocalyptic number.

It is an amenable number.

102402252245 is a deficient number, since it is larger than the sum of its proper divisors (20480450455).

102402252245 is an equidigital number, since it uses as much as digits as its factorization.

102402252245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480450454.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 102402252245 its reverse (542252204201), we get a palindrome (644654456446).

The spelling of 102402252245 in words is "one hundred two billion, four hundred two million, two hundred fifty-two thousand, two hundred forty-five".