102420254 has 16 divisors (see below), whose sum is σ = 155333376. Its totient is φ = 50645400.

The previous prime is 102420251. The next prime is 102420277. The reversal of 102420254 is 452024201.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102420251) 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, 112469 + ... + 113375.

It is an arithmetic number, because the mean of its divisors is an integer number (9708336).

Almost surely, 2^102420254 is an apocalyptic number.

102420254 is a deficient number, since it is larger than the sum of its proper divisors (52913122).

102420254 is a wasteful number, since it uses less digits than its factorization.

102420254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 102420254 is about 10120.2892251160. The cubic root of 102420254 is about 467.8736814219.

Adding to 102420254 its reverse (452024201), we get a palindrome (554444455).

The spelling of 102420254 in words is "one hundred two million, four hundred twenty thousand, two hundred fifty-four".