30121292 has 6 divisors (see below), whose sum is σ = 52712268. Its totient is φ = 15060644.

The previous prime is 30121271. The next prime is 30121303. The reversal of 30121292 is 29212103.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765158 + ... + 3765165.

It is an arithmetic number, because the mean of its divisors is an integer number (8785378).

Almost surely, 2^30121292 is an apocalyptic number.

It is an amenable number.

30121292 is a deficient number, since it is larger than the sum of its proper divisors (22590976).

30121292 is a wasteful number, since it uses less digits than its factorization.

30121292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530327 (or 7530325 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30121292 is about 5488.2868000862. The cubic root of 30121292 is about 311.1414457761.

Adding to 30121292 its reverse (29212103), we get a palindrome (59333395).

The spelling of 30121292 in words is "thirty million, one hundred twenty-one thousand, two hundred ninety-two".