102120254 has 4 divisors (see below), whose sum is σ = 153180384. Its totient is φ = 51060126.

The previous prime is 102120203. The next prime is 102120301. The reversal of 102120254 is 452021201.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530062 + ... + 25530065.

It is an arithmetic number, because the mean of its divisors is an integer number (38295096).

Almost surely, 2^102120254 is an apocalyptic number.

102120254 is a deficient number, since it is larger than the sum of its proper divisors (51060130).

102120254 is an equidigital number, since it uses as much as digits as its factorization.

102120254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060129.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 102120254 is about 10105.4566448033. The cubic root of 102120254 is about 467.4164171353.

Adding to 102120254 its reverse (452021201), we get a palindrome (554141455).

The spelling of 102120254 in words is "one hundred two million, one hundred twenty thousand, two hundred fifty-four".