30561142 has 8 divisors (see below), whose sum is σ = 46107216. Its totient is φ = 15192072.

The previous prime is 30561137. The next prime is 30561143. The reversal of 30561142 is 24116503.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30561143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43818 + ... + 44509.

It is an arithmetic number, because the mean of its divisors is an integer number (5763402).

Almost surely, 2^30561142 is an apocalyptic number.

30561142 is a deficient number, since it is larger than the sum of its proper divisors (15546074).

30561142 is a wasteful number, since it uses less digits than its factorization.

30561142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88502.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 30561142 is about 5528.2132737441. The cubic root of 30561142 is about 312.6486273272.

Adding to 30561142 its reverse (24116503), we get a palindrome (54677645).

It can be divided in two parts, 30561 and 142, that added together give a palindrome (30703).

The spelling of 30561142 in words is "thirty million, five hundred sixty-one thousand, one hundred forty-two".