125435641 has 4 divisors (see below), whose sum is σ = 129481984. Its totient is φ = 121389300.

The previous prime is 125435633. The next prime is 125435669. The reversal of 125435641 is 146534521.

It is a happy number.

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: 146534521 = 7 ⋅20933503.

It is a cyclic number.

It is not a de Polignac number, because 125435641 - 2³ = 125435633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 4046311 = 125435641 / (1 + 2 + 5 + 4 + 3 + 5 + 6 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125435671) 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, 2023125 + ... + 2023186.

It is an arithmetic number, because the mean of its divisors is an integer number (32370496).

Almost surely, 2^125435641 is an apocalyptic number.

It is an amenable number.

125435641 is a deficient number, since it is larger than the sum of its proper divisors (4046343).

125435641 is an equidigital number, since it uses as much as digits as its factorization.

125435641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4046342.

The product of its digits is 14400, while the sum is 31.

The square root of 125435641 is about 11199.8054000951. The cubic root of 125435641 is about 500.5801811859.

The spelling of 125435641 in words is "one hundred twenty-five million, four hundred thirty-five thousand, six hundred forty-one".