1401765505 has 32 divisors (see below), whose sum is σ = 1945177344. Its totient is φ = 949902336.

The previous prime is 1401765487. The next prime is 1401765509. The reversal of 1401765505 is 5055671041.

It is a cyclic number.

It is not a de Polignac number, because 1401765505 - 2²¹ = 1399668353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401765509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1356469 + ... + 1357501.

It is an arithmetic number, because the mean of its divisors is an integer number (60786792).

Almost surely, 2^1401765505 is an apocalyptic number.

It is an amenable number.

1401765505 is a deficient number, since it is larger than the sum of its proper divisors (543411839).

1401765505 is a wasteful number, since it uses less digits than its factorization.

1401765505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 1401765505 is about 37440.1589873761. The cubic root of 1401765505 is about 1119.1589947654.

The spelling of 1401765505 in words is "one billion, four hundred one million, seven hundred sixty-five thousand, five hundred five".