1346236561 has 12 divisors (see below), whose sum is σ = 1398972432. Its totient is φ = 1295183736.

The previous prime is 1346236559. The next prime is 1346236603. The reversal of 1346236561 is 1656326431.

It is not a de Polignac number, because 1346236561 - 2¹ = 1346236559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1346236561.

It is not an unprimeable number, because it can be changed into a prime (1346236531) 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, 118450 + ... + 129316.

It is an arithmetic number, because the mean of its divisors is an integer number (116581036).

Almost surely, 2^1346236561 is an apocalyptic number.

It is an amenable number.

1346236561 is a deficient number, since it is larger than the sum of its proper divisors (52735871).

1346236561 is an equidigital number, since it uses as much as digits as its factorization.

1346236561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020 (or 10977 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 1346236561 is about 36691.0964812991. The cubic root of 1346236561 is about 1104.1814843007.

The spelling of 1346236561 in words is "one billion, three hundred forty-six million, two hundred thirty-six thousand, five hundred sixty-one".