102390254 has 4 divisors (see below), whose sum is σ = 153585384. Its totient is φ = 51195126.

The previous prime is 102390247. The next prime is 102390257. The reversal of 102390254 is 452093201.

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

It is a super-2 number, since 2×102390254² = 20967528228369032, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102390257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25597562 + ... + 25597565.

It is an arithmetic number, because the mean of its divisors is an integer number (38396346).

Almost surely, 2^102390254 is an apocalyptic number.

102390254 is a deficient number, since it is larger than the sum of its proper divisors (51195130).

102390254 is an equidigital number, since it uses as much as digits as its factorization.

102390254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51195129.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 102390254 is about 10118.8069454852. The cubic root of 102390254 is about 467.8279952073.

The spelling of 102390254 in words is "one hundred two million, three hundred ninety thousand, two hundred fifty-four".