1353188261 has 4 divisors (see below), whose sum is σ = 1353493932. Its totient is φ = 1352882592.

The previous prime is 1353188201. The next prime is 1353188273. The reversal of 1353188261 is 1628813531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1628813531 = 59 ⋅27607009.

It can be written as a sum of positive squares in 2 ways, for example, as 1096868161 + 256320100 = 33119^2 + 16010^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353188261 - 2⁶ = 1353188197 is a prime.

It is a super-2 number, since 2×1353188261² = 3662236939416408242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353188201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146096 + ... + 155081.

It is an arithmetic number, because the mean of its divisors is an integer number (338373483).

Almost surely, 2^1353188261 is an apocalyptic number.

It is an amenable number.

1353188261 is a deficient number, since it is larger than the sum of its proper divisors (305671).

1353188261 is an equidigital number, since it uses as much as digits as its factorization.

1353188261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305670.

The product of its digits is 34560, while the sum is 38.

The square root of 1353188261 is about 36785.7072923710. The cubic root of 1353188261 is about 1106.0788140063.

The spelling of 1353188261 in words is "one billion, three hundred fifty-three million, one hundred eighty-eight thousand, two hundred sixty-one".