125668619 has 4 divisors (see below), whose sum is σ = 131132496. Its totient is φ = 120204744.

The previous prime is 125668597. The next prime is 125668639. The reversal of 125668619 is 916866521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125668619 - 2¹⁶ = 125603083 is a prime.

It is a super-2 number, since 2×125668619² = 31585203602734322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125668619.

It is not an unprimeable number, because it can be changed into a prime (125668639) 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, 2731904 + ... + 2731949.

It is an arithmetic number, because the mean of its divisors is an integer number (32783124).

Almost surely, 2^125668619 is an apocalyptic number.

125668619 is a deficient number, since it is larger than the sum of its proper divisors (5463877).

125668619 is an equidigital number, since it uses as much as digits as its factorization.

125668619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463876.

The product of its digits is 155520, while the sum is 44.

The square root of 125668619 is about 11210.2015592941. The cubic root of 125668619 is about 500.8899071907.

The spelling of 125668619 in words is "one hundred twenty-five million, six hundred sixty-eight thousand, six hundred nineteen".