10001378 has 4 divisors (see below), whose sum is σ = 15002070. Its totient is φ = 5000688.

The previous prime is 10001363. The next prime is 10001399. The reversal of 10001378 is 87310001.

10001378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87310001 = 23 ⋅3796087.

It can be written as a sum of positive squares in only one way, i.e., 5536609 + 4464769 = 2353^2 + 2113^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500343 + ... + 2500346.

Almost surely, 2^10001378 is an apocalyptic number.

10001378 is a deficient number, since it is larger than the sum of its proper divisors (5000692).

10001378 is an equidigital number, since it uses as much as digits as its factorization.

10001378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000691.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 10001378 is about 3162.4955335937. The cubic root of 10001378 is about 215.4533645853.

Adding to 10001378 its reverse (87310001), we get a palindrome (97311379).

The spelling of 10001378 in words is "ten million, one thousand, three hundred seventy-eight".