30125861 has 4 divisors (see below), whose sum is σ = 30240672. Its totient is φ = 30011052.

The previous prime is 30125839. The next prime is 30125869. The reversal of 30125861 is 16852103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30125861 - 2¹⁴ = 30109477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30125861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30125869) 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, 57011 + ... + 57536.

It is an arithmetic number, because the mean of its divisors is an integer number (7560168).

Almost surely, 2^30125861 is an apocalyptic number.

It is an amenable number.

30125861 is a deficient number, since it is larger than the sum of its proper divisors (114811).

30125861 is a wasteful number, since it uses less digits than its factorization.

30125861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114810.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 30125861 is about 5488.7030344153. The cubic root of 30125861 is about 311.1571769892.

Adding to 30125861 its reverse (16852103), we get a palindrome (46977964).

It can be divided in two parts, 301 and 25861, that added together give a palindrome (26162).

The spelling of 30125861 in words is "thirty million, one hundred twenty-five thousand, eight hundred sixty-one".