545142123 has 16 divisors (see below), whose sum is σ = 821308800. Its totient is φ = 357267240.

The previous prime is 545142121. The next prime is 545142137. The reversal of 545142123 is 321241545.

It is not a de Polignac number, because 545142123 - 2¹ = 545142121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (545142121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169513 + ... + 172698.

It is an arithmetic number, because the mean of its divisors is an integer number (51331800).

Almost surely, 2^545142123 is an apocalyptic number.

545142123 is a deficient number, since it is larger than the sum of its proper divisors (276166677).

545142123 is a wasteful number, since it uses less digits than its factorization.

545142123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342279 (or 342273 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 545142123 is about 23348.2788016590. The cubic root of 545142123 is about 816.9019141990.

Adding to 545142123 its reverse (321241545), we get a palindrome (866383668).

It can be divided in two parts, 5451 and 42123, that added together give a palindrome (47574).

The spelling of 545142123 in words is "five hundred forty-five million, one hundred forty-two thousand, one hundred twenty-three".