125211819 has 8 divisors (see below), whose sum is σ = 167084352. Its totient is φ = 83406920.

The previous prime is 125211803. The next prime is 125211869. The reversal of 125211819 is 918112521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125211819 - 2⁴ = 125211803 is a prime.

It is a super-2 number, since 2×125211819² = 31355999234577522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125211869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12417 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (20885544).

Almost surely, 2^125211819 is an apocalyptic number.

125211819 is a deficient number, since it is larger than the sum of its proper divisors (41872533).

125211819 is a wasteful number, since it uses less digits than its factorization.

125211819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33817.

The product of its digits is 1440, while the sum is 30.

The square root of 125211819 is about 11189.8087115017. The cubic root of 125211819 is about 500.2822659552.

The spelling of 125211819 in words is "one hundred twenty-five million, two hundred eleven thousand, eight hundred nineteen".