102742455 has 8 divisors (see below), whose sum is σ = 164387952. Its totient is φ = 54795968.

The previous prime is 102742429. The next prime is 102742487. The reversal of 102742455 is 554247201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102742455 - 2⁷ = 102742327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3424734 + ... + 3424763.

It is an arithmetic number, because the mean of its divisors is an integer number (20548494).

Almost surely, 2^102742455 is an apocalyptic number.

102742455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102742455 is a deficient number, since it is larger than the sum of its proper divisors (61645497).

102742455 is an equidigital number, since it uses as much as digits as its factorization.

102742455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6849505.

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 102742455 is about 10136.1952921202. The cubic root of 102742455 is about 468.3637913967.

Adding to 102742455 its reverse (554247201), we get a palindrome (656989656).

The spelling of 102742455 in words is "one hundred two million, seven hundred forty-two thousand, four hundred fifty-five".