10378921 has 16 divisors (see below), whose sum is σ = 12668800. Its totient is φ = 8304768.

The previous prime is 10378919. The next prime is 10378931. The reversal of 10378921 is 12987301.

It is a cyclic number.

It is not a de Polignac number, because 10378921 - 2¹ = 10378919 is a prime.

It is a super-2 number, since 2×10378921² = 215444002248482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10378931) 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, 9175 + ... + 10243.

It is an arithmetic number, because the mean of its divisors is an integer number (791800).

Almost surely, 2^10378921 is an apocalyptic number.

It is an amenable number.

10378921 is a deficient number, since it is larger than the sum of its proper divisors (2289879).

10378921 is a wasteful number, since it uses less digits than its factorization.

10378921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 10378921 is about 3221.6332814273. The cubic root of 10378921 is about 218.1310059019.

The spelling of 10378921 in words is "ten million, three hundred seventy-eight thousand, nine hundred twenty-one".