1401565387 has 2 divisors, whose sum is σ = 1401565388. Its totient is φ = 1401565386.

The previous prime is 1401565339. The next prime is 1401565411. The reversal of 1401565387 is 7835651041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401565387 - 2⁷ = 1401565259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1401565327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700782693 + 700782694.

It is an arithmetic number, because the mean of its divisors is an integer number (700782694).

Almost surely, 2^1401565387 is an apocalyptic number.

1401565387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401565387 is an equidigital number, since it uses as much as digits as its factorization.

1401565387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 1401565387 is about 37437.4863873097. The cubic root of 1401565387 is about 1119.1057346641.

The spelling of 1401565387 in words is "one billion, four hundred one million, five hundred sixty-five thousand, three hundred eighty-seven".