102156450 has 96 divisors (see below), whose sum is σ = 279571392. Its totient is φ = 24480000.

The previous prime is 102156449. The next prime is 102156463. The reversal of 102156450 is 54651201.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 102156450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166344 + ... + 166956.

It is an arithmetic number, because the mean of its divisors is an integer number (2912202).

Almost surely, 2^102156450 is an apocalyptic number.

102156450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102156450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139785696).

102156450 is an abundant number, since it is smaller than the sum of its proper divisors (177414942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102156450 is a wasteful number, since it uses less digits than its factorization.

102156450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 102156450 is about 10107.2473997622. The cubic root of 102156450 is about 467.4716350621.

The spelling of 102156450 in words is "one hundred two million, one hundred fifty-six thousand, four hundred fifty".