102142545 has 16 divisors (see below), whose sum is σ = 173041920. Its totient is φ = 51271424.

The previous prime is 102142543. The next prime is 102142559. The reversal of 102142545 is 545241201.

It is a cyclic number.

It is not a de Polignac number, because 102142545 - 2¹ = 102142543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102142543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 200025 + ... + 200534.

It is an arithmetic number, because the mean of its divisors is an integer number (10815120).

Almost surely, 2^102142545 is an apocalyptic number.

102142545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102142545 is a deficient number, since it is larger than the sum of its proper divisors (70899375).

102142545 is a wasteful number, since it uses less digits than its factorization.

102142545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400584.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 102142545 is about 10106.5595036095. The cubic root of 102142545 is about 467.4504241709.

Adding to 102142545 its reverse (545241201), we get a palindrome (647383746).

The spelling of 102142545 in words is "one hundred two million, one hundred forty-two thousand, five hundred forty-five".