125445091 has 4 divisors (see below), whose sum is σ = 132824232. Its totient is φ = 118065952.

The previous prime is 125445083. The next prime is 125445101. The reversal of 125445091 is 190544521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190544521 = 19 ⋅10028659.

It is not a de Polignac number, because 125445091 - 2³ = 125445083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125445071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3689545 + ... + 3689578.

It is an arithmetic number, because the mean of its divisors is an integer number (33206058).

Almost surely, 2^125445091 is an apocalyptic number.

125445091 is a deficient number, since it is larger than the sum of its proper divisors (7379141).

125445091 is an equidigital number, since it uses as much as digits as its factorization.

125445091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7379140.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 125445091 is about 11200.2272744797. The cubic root of 125445091 is about 500.5927516799.

The spelling of 125445091 in words is "one hundred twenty-five million, four hundred forty-five thousand, ninety-one".