125438891 has 8 divisors (see below), whose sum is σ = 129891600. Its totient is φ = 120994720.

The previous prime is 125438881. The next prime is 125438923. The reversal of 125438891 is 198834521.

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 125438891 - 2¹⁸ = 125176747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125438821) 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, 48296 + ... + 50826.

It is an arithmetic number, because the mean of its divisors is an integer number (16236450).

Almost surely, 2^125438891 is an apocalyptic number.

125438891 is a deficient number, since it is larger than the sum of its proper divisors (4452709).

125438891 is a wasteful number, since it uses less digits than its factorization.

125438891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269.

The product of its digits is 69120, while the sum is 41.

The square root of 125438891 is about 11199.9504909620. The cubic root of 125438891 is about 500.5845044429.

The spelling of 125438891 in words is "one hundred twenty-five million, four hundred thirty-eight thousand, eight hundred ninety-one".