30142545 has 8 divisors (see below), whose sum is σ = 48228096. Its totient is φ = 16076016.

The previous prime is 30142543. The next prime is 30142549. The reversal of 30142545 is 54524103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30142545 - 2¹ = 30142543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30142543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004737 + ... + 1004766.

It is an arithmetic number, because the mean of its divisors is an integer number (6028512).

Almost surely, 2^30142545 is an apocalyptic number.

It is an amenable number.

30142545 is a deficient number, since it is larger than the sum of its proper divisors (18085551).

30142545 is a wasteful number, since it uses less digits than its factorization.

30142545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009511.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 30142545 is about 5490.2226730798. Note that the first 3 decimals coincide. The cubic root of 30142545 is about 311.2146070302.

Adding to 30142545 its reverse (54524103), we get a palindrome (84666648).

It can be divided in two parts, 30 and 142545, that multiplied together give a triangular number (4276350 = T₂₉₂₄).

The spelling of 30142545 in words is "thirty million, one hundred forty-two thousand, five hundred forty-five".