125454221 has 4 divisors (see below), whose sum is σ = 126696444. Its totient is φ = 124212000.

The previous prime is 125454209. The next prime is 125454229. The reversal of 125454221 is 122454521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 76650025 + 48804196 = 8755^2 + 6986^2 .

It is a cyclic number.

It is not a de Polignac number, because 125454221 - 2²² = 121259917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125454229) 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, 620960 + ... + 621161.

It is an arithmetic number, because the mean of its divisors is an integer number (31674111).

Almost surely, 2^125454221 is an apocalyptic number.

It is an amenable number.

125454221 is a deficient number, since it is larger than the sum of its proper divisors (1242223).

125454221 is a wasteful number, since it uses less digits than its factorization.

125454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242222.

The product of its digits is 3200, while the sum is 26.

The square root of 125454221 is about 11200.6348480789. The cubic root of 125454221 is about 500.6048959068.

The spelling of 125454221 in words is "one hundred twenty-five million, four hundred fifty-four thousand, two hundred twenty-one".