125199811 has 8 divisors (see below), whose sum is σ = 137421504. Its totient is φ = 113118120.

The previous prime is 125199803. The next prime is 125199817. The reversal of 125199811 is 118991521.

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 125199811 - 2³ = 125199803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125199817) 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, 33121 + ... + 36706.

It is an arithmetic number, because the mean of its divisors is an integer number (17177688).

Almost surely, 2^125199811 is an apocalyptic number.

125199811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125199811 is a deficient number, since it is larger than the sum of its proper divisors (12221693).

125199811 is a wasteful number, since it uses less digits than its factorization.

125199811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70001.

The product of its digits is 6480, while the sum is 37.

The square root of 125199811 is about 11189.2721389731. The cubic root of 125199811 is about 500.2662728390.

The spelling of 125199811 in words is "one hundred twenty-five million, one hundred ninety-nine thousand, eight hundred eleven".