10421257 has 16 divisors (see below), whose sum is σ = 13313664. Its totient is φ = 7920000.

The previous prime is 10421251. The next prime is 10421287. The reversal of 10421257 is 75212401.

It is a happy number.

It is not a de Polignac number, because 10421257 - 2⁷ = 10421129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10421251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507 + ... + 4807.

It is an arithmetic number, because the mean of its divisors is an integer number (832104).

Almost surely, 2^10421257 is an apocalyptic number.

It is an amenable number.

10421257 is a deficient number, since it is larger than the sum of its proper divisors (2892407).

10421257 is a wasteful number, since it uses less digits than its factorization.

10421257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360.

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

The square root of 10421257 is about 3228.1971748950. The cubic root of 10421257 is about 218.4271916772.

Adding to 10421257 its reverse (75212401), we get a palindrome (85633658).

The spelling of 10421257 in words is "ten million, four hundred twenty-one thousand, two hundred fifty-seven".