102661455 has 32 divisors (see below), whose sum is σ = 179053056. Its totient is φ = 49924224.

The previous prime is 102661451. The next prime is 102661457. The reversal of 102661455 is 554166201.

It is not a de Polignac number, because 102661455 - 2² = 102661451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102661451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13014 + ... + 19356.

It is an arithmetic number, because the mean of its divisors is an integer number (5595408).

Almost surely, 2^102661455 is an apocalyptic number.

102661455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102661455 is a deficient number, since it is larger than the sum of its proper divisors (76391601).

102661455 is a wasteful number, since it uses less digits than its factorization.

102661455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6447.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 102661455 is about 10132.1989222478. The cubic root of 102661455 is about 468.2406763022.

It can be divided in two parts, 1026 and 61455, that added together give a triangular number (62481 = T₃₅₃).

The spelling of 102661455 in words is "one hundred two million, six hundred sixty-one thousand, four hundred fifty-five".