125878417 has 4 divisors (see below), whose sum is σ = 143861056. Its totient is φ = 107895780.

The previous prime is 125878409. The next prime is 125878427. The reversal of 125878417 is 714878521.

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: 714878521 = 7 ⋅102125503.

It is a cyclic number.

It is not a de Polignac number, because 125878417 - 2³ = 125878409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125878427) 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, 8991309 + ... + 8991322.

It is an arithmetic number, because the mean of its divisors is an integer number (35965264).

Almost surely, 2^125878417 is an apocalyptic number.

It is an amenable number.

125878417 is a deficient number, since it is larger than the sum of its proper divisors (17982639).

125878417 is an equidigital number, since it uses as much as digits as its factorization.

125878417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17982638.

The product of its digits is 125440, while the sum is 43.

The square root of 125878417 is about 11219.5551159571. Note that the first 3 decimals coincide. The cubic root of 125878417 is about 501.1684898026.

The spelling of 125878417 in words is "one hundred twenty-five million, eight hundred seventy-eight thousand, four hundred seventeen".