10258421 has 4 divisors (see below), whose sum is σ = 10265772. Its totient is φ = 10251072.

The previous prime is 10258399. The next prime is 10258433. The reversal of 10258421 is 12485201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12485201 = 757 ⋅16493.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 4431025 = 2414^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 10258421 - 2²² = 6064117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10258121) 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, 866 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (2566443).

Almost surely, 2^10258421 is an apocalyptic number.

It is an amenable number.

10258421 is a deficient number, since it is larger than the sum of its proper divisors (7351).

10258421 is an equidigital number, since it uses as much as digits as its factorization.

10258421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7350.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 10258421 is about 3202.8769879594. The cubic root of 10258421 is about 217.2835456124.

The spelling of 10258421 in words is "ten million, two hundred fifty-eight thousand, four hundred twenty-one".