19125481 has 4 divisors (see below), whose sum is σ = 19742464. Its totient is φ = 18508500.

The previous prime is 19125439. The next prime is 19125487. The reversal of 19125481 is 18452191.

It is a happy number.

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 19125481 - 2⁹ = 19124969 is a prime.

It is a super-2 number, since 2×19125481² = 731568046962722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 616951 = 19125481 / (1 + 9 + 1 + 2 + 5 + 4 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19125487) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 308445 + ... + 308506.

It is an arithmetic number, because the mean of its divisors is an integer number (4935616).

Almost surely, 2^19125481 is an apocalyptic number.

It is an amenable number.

19125481 is a deficient number, since it is larger than the sum of its proper divisors (616983).

19125481 is an equidigital number, since it uses as much as digits as its factorization.

19125481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616982.

The product of its digits is 2880, while the sum is 31.

The square root of 19125481 is about 4373.2689146678. The cubic root of 19125481 is about 267.4263039774.

The spelling of 19125481 in words is "nineteen million, one hundred twenty-five thousand, four hundred eighty-one".