30121250 has 20 divisors (see below), whose sum is σ = 56461614. Its totient is φ = 12048000.

The previous prime is 30121241. The next prime is 30121261. The reversal of 30121250 is 5212103.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 2105401 + 28015849 = 1451^2 + 5293^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10799 + ... + 13298.

Almost surely, 2^30121250 is an apocalyptic number.

30121250 is a deficient number, since it is larger than the sum of its proper divisors (26340364).

30121250 is an equidigital number, since it uses as much as digits as its factorization.

30121250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24119 (or 24104 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 30121250 is about 5488.2829737542. The cubic root of 30121250 is about 311.1413011614.

Adding to 30121250 its reverse (5212103), we get a palindrome (35333353).

The spelling of 30121250 in words is "thirty million, one hundred twenty-one thousand, two hundred fifty".