1378752201 has 12 divisors (see below), whose sum is σ = 2045356612. Its totient is φ = 894325536.

The previous prime is 1378752169. The next prime is 1378752203. The reversal of 1378752201 is 1022578731.

It can be written as a sum of positive squares in 2 ways, for example, as 1288881801 + 89870400 = 35901^2 + 9480^2 .

It is not a de Polignac number, because 1378752201 - 2⁵ = 1378752169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378752203) 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, 2069866 + ... + 2070531.

Almost surely, 2^1378752201 is an apocalyptic number.

It is an amenable number.

1378752201 is a deficient number, since it is larger than the sum of its proper divisors (666604411).

1378752201 is a wasteful number, since it uses less digits than its factorization.

1378752201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140440 (or 4140437 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 1378752201 is about 37131.5526338450. The cubic root of 1378752201 is about 1113.0006199700. Note that the first 3 decimals are identical.

The spelling of 1378752201 in words is "one billion, three hundred seventy-eight million, seven hundred fifty-two thousand, two hundred one".