1355245105 has 4 divisors (see below), whose sum is σ = 1626294132. Its totient is φ = 1084196080.

The previous prime is 1355245093. The next prime is 1355245109. The reversal of 1355245105 is 5015425531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5015425531 = 3191 ⋅1571741.

It can be written as a sum of positive squares in 2 ways, for example, as 724632561 + 630612544 = 26919^2 + 25112^2 .

It is not a de Polignac number, because 1355245105 - 2¹³ = 1355236913 is a prime.

It is a super-2 number, since 2×1355245105² = 3673378589252922050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355245109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135524506 + ... + 135524515.

It is an arithmetic number, because the mean of its divisors is an integer number (406573533).

Almost surely, 2^1355245105 is an apocalyptic number.

It is an amenable number.

1355245105 is a deficient number, since it is larger than the sum of its proper divisors (271049027).

1355245105 is an equidigital number, since it uses as much as digits as its factorization.

1355245105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271049026.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1355245105 is about 36813.6537849749. The cubic root of 1355245105 is about 1106.6389429818.

The spelling of 1355245105 in words is "one billion, three hundred fifty-five million, two hundred forty-five thousand, one hundred five".