1378742401 has 4 divisors (see below), whose sum is σ = 1391627952. Its totient is φ = 1365856852.

The previous prime is 1378742377. The next prime is 1378742413. The reversal of 1378742401 is 1042478731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1378742401 - 2¹⁹ = 1378218113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378742441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6442615 + ... + 6442828.

It is an arithmetic number, because the mean of its divisors is an integer number (347906988).

Almost surely, 2^1378742401 is an apocalyptic number.

It is an amenable number.

1378742401 is a deficient number, since it is larger than the sum of its proper divisors (12885551).

1378742401 is a wasteful number, since it uses less digits than its factorization.

1378742401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885550.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 1378742401 is about 37131.4206703703. The cubic root of 1378742401 is about 1112.9979829402.

The spelling of 1378742401 in words is "one billion, three hundred seventy-eight million, seven hundred forty-two thousand, four hundred one".