125421611 has 4 divisors (see below), whose sum is σ = 143338992. Its totient is φ = 107504232.

The previous prime is 125421589. The next prime is 125421617. The reversal of 125421611 is 116124521.

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 125421611 - 2¹⁸ = 125159467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125421617) 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, 8958680 + ... + 8958693.

It is an arithmetic number, because the mean of its divisors is an integer number (35834748).

Almost surely, 2^125421611 is an apocalyptic number.

125421611 is a deficient number, since it is larger than the sum of its proper divisors (17917381).

125421611 is an equidigital number, since it uses as much as digits as its factorization.

125421611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17917380.

The product of its digits is 480, while the sum is 23.

The square root of 125421611 is about 11199.1790324113. The cubic root of 125421611 is about 500.5615171609.

The spelling of 125421611 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred eleven".