1201565003 has 2 divisors, whose sum is σ = 1201565004. Its totient is φ = 1201565002.

The previous prime is 1201564979. The next prime is 1201565009. The reversal of 1201565003 is 3005651021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201565003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201565003.

It is not a weakly prime, because it can be changed into another prime (1201565009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600782501 + 600782502.

It is an arithmetic number, because the mean of its divisors is an integer number (600782502).

Almost surely, 2^1201565003 is an apocalyptic number.

1201565003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201565003 is an equidigital number, since it uses as much as digits as its factorization.

1201565003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1201565003 is about 34663.5976638317. The cubic root of 1201565003 is about 1063.1203306826.

The spelling of 1201565003 in words is "one billion, two hundred one million, five hundred sixty-five thousand, three".