1355345261 has 8 divisors (see below), whose sum is σ = 1392687384. Its totient is φ = 1318040640.

The previous prime is 1355345239. The next prime is 1355345279. The reversal of 1355345261 is 1625435531.

It can be written as a sum of positive squares in 4 ways, for example, as 206813161 + 1148532100 = 14381^2 + 33890^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1355345261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355345231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73931 + ... + 90423.

It is an arithmetic number, because the mean of its divisors is an integer number (174085923).

Almost surely, 2^1355345261 is an apocalyptic number.

It is an amenable number.

1355345261 is a deficient number, since it is larger than the sum of its proper divisors (37342123).

1355345261 is a wasteful number, since it uses less digits than its factorization.

1355345261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18751.

The product of its digits is 54000, while the sum is 35.

The square root of 1355345261 is about 36815.0140703491. The cubic root of 1355345261 is about 1106.6662034381. Note that the first 3 decimals are identical.

The spelling of 1355345261 in words is "one billion, three hundred fifty-five million, three hundred forty-five thousand, two hundred sixty-one".