30142565 has 4 divisors (see below), whose sum is σ = 36171084. Its totient is φ = 24114048.

The previous prime is 30142559. The next prime is 30142573. The reversal of 30142565 is 56524103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19377604 + 10764961 = 4402^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 30142565 - 2⁴ = 30142549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014252 + ... + 3014261.

It is an arithmetic number, because the mean of its divisors is an integer number (9042771).

Almost surely, 2^30142565 is an apocalyptic number.

It is an amenable number.

30142565 is a deficient number, since it is larger than the sum of its proper divisors (6028519).

30142565 is an equidigital number, since it uses as much as digits as its factorization.

30142565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6028518.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 30142565 is about 5490.2244944993. The cubic root of 30142565 is about 311.2146758619.

Adding to 30142565 its reverse (56524103), we get a palindrome (86666668).

The spelling of 30142565 in words is "thirty million, one hundred forty-two thousand, five hundred sixty-five".