30153121 has 4 divisors (see below), whose sum is σ = 31926852. Its totient is φ = 28379392.

The previous prime is 30153119. The next prime is 30153139. The reversal of 30153121 is 12135103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17472400 + 12680721 = 4180^2 + 3561^2 .

It is not a de Polignac number, because 30153121 - 2¹ = 30153119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30153095 and 30153104.

It is not an unprimeable number, because it can be changed into a prime (30153181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886840 + ... + 886873.

It is an arithmetic number, because the mean of its divisors is an integer number (7981713).

Almost surely, 2^30153121 is an apocalyptic number.

It is an amenable number.

30153121 is a deficient number, since it is larger than the sum of its proper divisors (1773731).

30153121 is a wasteful number, since it uses less digits than its factorization.

30153121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773730.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 30153121 is about 5491.1857553720. The cubic root of 30153121 is about 311.2510010021.

Adding to 30153121 its reverse (12135103), we get a palindrome (42288224).

The spelling of 30153121 in words is "thirty million, one hundred fifty-three thousand, one hundred twenty-one".