125141991 has 8 divisors (see below), whose sum is σ = 179691120. Its totient is φ = 77010432.

The previous prime is 125141983. The next prime is 125142001. The reversal of 125141991 is 199141521.

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

It is not a de Polignac number, because 125141991 - 2³ = 125141983 is a prime.

It is a super-2 number, since 2×125141991² = 31321035822888162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125141591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1604346 + ... + 1604423.

It is an arithmetic number, because the mean of its divisors is an integer number (22461390).

Almost surely, 2^125141991 is an apocalyptic number.

125141991 is a deficient number, since it is larger than the sum of its proper divisors (54549129).

125141991 is a wasteful number, since it uses less digits than its factorization.

125141991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208785.

The product of its digits is 3240, while the sum is 33.

The square root of 125141991 is about 11186.6881157919. The cubic root of 125141991 is about 500.1892496934.

The spelling of 125141991 in words is "one hundred twenty-five million, one hundred forty-one thousand, nine hundred ninety-one".