30409142 has 4 divisors (see below), whose sum is σ = 45613716. Its totient is φ = 15204570.

The previous prime is 30409097. The next prime is 30409163. The reversal of 30409142 is 24190403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24190403 = 157 ⋅154079.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7602284 + ... + 7602287.

It is an arithmetic number, because the mean of its divisors is an integer number (11403429).

Almost surely, 2^30409142 is an apocalyptic number.

30409142 is a deficient number, since it is larger than the sum of its proper divisors (15204574).

30409142 is a wasteful number, since it uses less digits than its factorization.

30409142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15204573.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30409142 is about 5514.4484765024. The cubic root of 30409142 is about 312.1294321079.

Adding to 30409142 its reverse (24190403), we get a palindrome (54599545).

The spelling of 30409142 in words is "thirty million, four hundred nine thousand, one hundred forty-two".