30142453 has 4 divisors (see below), whose sum is σ = 32882688. Its totient is φ = 27402220.

The previous prime is 30142439. The next prime is 30142477. The reversal of 30142453 is 35424103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30142453 - 2¹⁷ = 30011381 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1370101 + ... + 1370122.

It is an arithmetic number, because the mean of its divisors is an integer number (8220672).

Almost surely, 2^30142453 is an apocalyptic number.

It is an amenable number.

30142453 is a deficient number, since it is larger than the sum of its proper divisors (2740235).

30142453 is a wasteful number, since it uses less digits than its factorization.

30142453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740234.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30142453 is about 5490.2142945426. The cubic root of 30142453 is about 311.2142904038.

Adding to 30142453 its reverse (35424103), we get a palindrome (65566556).

The spelling of 30142453 in words is "thirty million, one hundred forty-two thousand, four hundred fifty-three".