102642550 has 24 divisors (see below), whose sum is σ = 197076672. Its totient is φ = 39732000.

The previous prime is 102642539. The next prime is 102642577. The reversal of 102642550 is 55246201.

102642550 = T₇₆ + T₇₇ + ... + T₈₅₀.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31561 + ... + 34660.

It is an arithmetic number, because the mean of its divisors is an integer number (8211528).

Almost surely, 2^102642550 is an apocalyptic number.

102642550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102642550 is a deficient number, since it is larger than the sum of its proper divisors (94434122).

102642550 is a wasteful number, since it uses less digits than its factorization.

102642550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66264 (or 66259 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 102642550 is about 10131.2659623563. The cubic root of 102642550 is about 468.2119325268.

Adding to 102642550 its reverse (55246201), we get a palindrome (157888751).

The spelling of 102642550 in words is "one hundred two million, six hundred forty-two thousand, five hundred fifty".