10172421 has 24 divisors (see below), whose sum is σ = 17074304. Its totient is φ = 5715360.

The previous prime is 10172419. The next prime is 10172431. The reversal of 10172421 is 12427101.

It is not a de Polignac number, because 10172421 - 2¹ = 10172419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10172394 and 10172403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10172431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2520 + ... + 5166.

Almost surely, 2^10172421 is an apocalyptic number.

It is an amenable number.

10172421 is a deficient number, since it is larger than the sum of its proper divisors (6901883).

10172421 is a wasteful number, since it uses less digits than its factorization.

10172421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 10172421 is about 3189.4233021034. The cubic root of 10172421 is about 216.6746524341.

Adding to 10172421 its reverse (12427101), we get a palindrome (22599522).

The spelling of 10172421 in words is "ten million, one hundred seventy-two thousand, four hundred twenty-one".