125454109 has 4 divisors (see below), whose sum is σ = 136859040. Its totient is φ = 114049180.

The previous prime is 125454097. The next prime is 125454149. The reversal of 125454109 is 901454521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901454521 = 11 ⋅81950411.

It is a cyclic number.

It is not a de Polignac number, because 125454109 - 2⁷ = 125453981 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125454149) 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, 5702449 + ... + 5702470.

It is an arithmetic number, because the mean of its divisors is an integer number (34214760).

Almost surely, 2^125454109 is an apocalyptic number.

It is an amenable number.

125454109 is a deficient number, since it is larger than the sum of its proper divisors (11404931).

125454109 is a wasteful number, since it uses less digits than its factorization.

125454109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11404930.

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

The square root of 125454109 is about 11200.6298483612. The cubic root of 125454109 is about 500.6047469341.

The spelling of 125454109 in words is "one hundred twenty-five million, four hundred fifty-four thousand, one hundred nine".