125421663 has 8 divisors (see below), whose sum is σ = 167280768. Its totient is φ = 83588504.

The previous prime is 125421661. The next prime is 125421677. The reversal of 125421663 is 366124521.

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 125421663 - 2¹ = 125421661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125421663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125421661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14470 + ... + 21452.

It is an arithmetic number, because the mean of its divisors is an integer number (20910096).

Almost surely, 2^125421663 is an apocalyptic number.

125421663 is a deficient number, since it is larger than the sum of its proper divisors (41859105).

125421663 is an equidigital number, since it uses as much as digits as its factorization.

125421663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12973.

The product of its digits is 8640, while the sum is 30.

The square root of 125421663 is about 11199.1813540098. The cubic root of 125421663 is about 500.5615863388.

The spelling of 125421663 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred sixty-three".