125566405 has 8 divisors (see below), whose sum is σ = 150982272. Its totient is φ = 100251408.

The previous prime is 125566387. The next prime is 125566439. The reversal of 125566405 is 504665521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125566405 - 2¹⁹ = 125042117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22449 + ... + 27478.

It is an arithmetic number, because the mean of its divisors is an integer number (18872784).

Almost surely, 2^125566405 is an apocalyptic number.

It is an amenable number.

125566405 is a deficient number, since it is larger than the sum of its proper divisors (25415867).

125566405 is an equidigital number, since it uses as much as digits as its factorization.

125566405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50435.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 125566405 is about 11205.6416594499. The cubic root of 125566405 is about 500.7540688553.

The spelling of 125566405 in words is "one hundred twenty-five million, five hundred sixty-six thousand, four hundred five".