10125421 has 4 divisors (see below), whose sum is σ = 10721052. Its totient is φ = 9529792.

The previous prime is 10125413. The next prime is 10125431. The reversal of 10125421 is 12452101.

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 6702921 + 3422500 = 2589^2 + 1850^2 .

It is not a de Polignac number, because 10125421 - 2³ = 10125413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10125395 and 10125404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10125431) 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, 297790 + ... + 297823.

It is an arithmetic number, because the mean of its divisors is an integer number (2680263).

Almost surely, 2^10125421 is an apocalyptic number.

It is an amenable number.

10125421 is a deficient number, since it is larger than the sum of its proper divisors (595631).

10125421 is an equidigital number, since it uses as much as digits as its factorization.

10125421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595630.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 10125421 is about 3182.0466684196. The cubic root of 10125421 is about 216.3404339592.

Adding to 10125421 its reverse (12452101), we get a palindrome (22577522).

The spelling of 10125421 in words is "ten million, one hundred twenty-five thousand, four hundred twenty-one".