1390012775 has 12 divisors (see below), whose sum is σ = 1783051800. Its totient is φ = 1073664480.

The previous prime is 1390012747. The next prime is 1390012777. The reversal of 1390012775 is 5772100931.

It is a happy number.

It is not a de Polignac number, because 1390012775 - 2¹⁸ = 1389750631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390012777) 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, 957905 + ... + 959354.

It is an arithmetic number, because the mean of its divisors is an integer number (148587650).

Almost surely, 2^1390012775 is an apocalyptic number.

1390012775 is a deficient number, since it is larger than the sum of its proper divisors (393039025).

1390012775 is a wasteful number, since it uses less digits than its factorization.

1390012775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917298 (or 1917293 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 1390012775 is about 37282.8750903146. The cubic root of 1390012775 is about 1116.0224488896.

The spelling of 1390012775 in words is "one billion, three hundred ninety million, twelve thousand, seven hundred seventy-five".