10257421 has 8 divisors (see below), whose sum is σ = 10733184. Its totient is φ = 9792480.

The previous prime is 10257407. The next prime is 10257437. The reversal of 10257421 is 12475201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10257421 - 2¹³ = 10249229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10257392 and 10257401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10257491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (1341648).

Almost surely, 2^10257421 is an apocalyptic number.

It is an amenable number.

10257421 is a deficient number, since it is larger than the sum of its proper divisors (475763).

10257421 is an equidigital number, since it uses as much as digits as its factorization.

10257421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5411.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 10257421 is about 3202.7208745065. The cubic root of 10257421 is about 217.2764850519.

The spelling of 10257421 in words is "ten million, two hundred fifty-seven thousand, four hundred twenty-one".