1356020861 has 16 divisors (see below), whose sum is σ = 1627617600. Its totient is φ = 1116073728.

The previous prime is 1356020843. The next prime is 1356020927. The reversal of 1356020861 is 1680206531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1356020861 - 2⁶ = 1356020797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356020801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157271 + ... + 165668.

It is an arithmetic number, because the mean of its divisors is an integer number (101726100).

Almost surely, 2^1356020861 is an apocalyptic number.

It is an amenable number.

1356020861 is a deficient number, since it is larger than the sum of its proper divisors (271596739).

1356020861 is a wasteful number, since it uses less digits than its factorization.

1356020861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322988.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1356020861 is about 36824.1885314531. The cubic root of 1356020861 is about 1106.8500531462.

The spelling of 1356020861 in words is "one billion, three hundred fifty-six million, twenty thousand, eight hundred sixty-one".