125226421 has 4 divisors (see below), whose sum is σ = 130671072. Its totient is φ = 119781772.

The previous prime is 125226419. The next prime is 125226433. The reversal of 125226421 is 124622521.

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.

It is a cyclic number.

It is not a de Polignac number, because 125226421 - 2¹ = 125226419 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 (125226461) 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, 2722291 + ... + 2722336.

It is an arithmetic number, because the mean of its divisors is an integer number (32667768).

Almost surely, 2^125226421 is an apocalyptic number.

It is an amenable number.

125226421 is a deficient number, since it is larger than the sum of its proper divisors (5444651).

125226421 is an equidigital number, since it uses as much as digits as its factorization.

125226421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444650.

The product of its digits is 1920, while the sum is 25.

The square root of 125226421 is about 11190.4611611854. The cubic root of 125226421 is about 500.3017125691.

Adding to 125226421 its reverse (124622521), we get a palindrome (249848942).

The spelling of 125226421 in words is "one hundred twenty-five million, two hundred twenty-six thousand, four hundred twenty-one".