10319421 has 12 divisors (see below), whose sum is σ = 15747296. Its totient is φ = 5888400.

The previous prime is 10319417. The next prime is 10319423. The reversal of 10319421 is 12491301.

10319421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10319421 - 2² = 10319417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10319423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14371 + ... + 15071.

Almost surely, 2^10319421 is an apocalyptic number.

It is an amenable number.

10319421 is a deficient number, since it is larger than the sum of its proper divisors (5427875).

10319421 is an frugal number, since it uses more digits than its factorization.

10319421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 10319421 is about 3212.3855621640. The cubic root of 10319421 is about 217.7133749606.

Multiplying 10319421 by its sum of digits (21), we get a square (216707841 = 14721²).

10319421 divided by its sum of digits (21) gives a square (491401 = 701²).

The spelling of 10319421 in words is "ten million, three hundred nineteen thousand, four hundred twenty-one".