1378801 has 2 divisors, whose sum is σ = 1378802. Its totient is φ = 1378800.

The previous prime is 1378799. The next prime is 1378807. The reversal of 1378801 is 1088731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 179776 = 1095^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378801 - 2¹ = 1378799 is a prime.

It is a super-3 number, since 3×1378801³ = 7863683469433369203, which contains 333 as substring.

Together with 1378799, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1378801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689400 + 689401.

It is an arithmetic number, because the mean of its divisors is an integer number (689401).

2^1378801 is an apocalyptic number.

It is an amenable number.

1378801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378801 is an equidigital number, since it uses as much as digits as its factorization.

1378801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1378801 is about 1174.2235732602. The cubic root of 1378801 is about 111.3013750847.

The spelling of 1378801 in words is "one million, three hundred seventy-eight thousand, eight hundred one".