125619091 has 8 divisors (see below), whose sum is σ = 135429840. Its totient is φ = 115829472.

The previous prime is 125619079. The next prime is 125619101. The reversal of 125619091 is 190916521.

It is a happy number.

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 125619091 - 2⁵ = 125619059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125619071) 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, 8400 + ... + 17938.

It is an arithmetic number, because the mean of its divisors is an integer number (16928730).

Almost surely, 2^125619091 is an apocalyptic number.

125619091 is a deficient number, since it is larger than the sum of its proper divisors (9810749).

125619091 is a wasteful number, since it uses less digits than its factorization.

125619091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565.

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 125619091 is about 11207.9922822957. The cubic root of 125619091 is about 500.8240956531.

The spelling of 125619091 in words is "one hundred twenty-five million, six hundred nineteen thousand, ninety-one".