1105212545 has 4 divisors (see below), whose sum is σ = 1326255060. Its totient is φ = 884170032.

The previous prime is 1105212529. The next prime is 1105212571. The reversal of 1105212545 is 5452125011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5452125011 = 409 ⋅13330379.

It can be written as a sum of positive squares in 2 ways, for example, as 241087729 + 864124816 = 15527^2 + 29396^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105212545 - 2⁴ = 1105212529 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110521250 + ... + 110521259.

It is an arithmetic number, because the mean of its divisors is an integer number (331563765).

Almost surely, 2^1105212545 is an apocalyptic number.

It is an amenable number.

1105212545 is a deficient number, since it is larger than the sum of its proper divisors (221042515).

1105212545 is an equidigital number, since it uses as much as digits as its factorization.

1105212545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221042514.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1105212545 is about 33244.7371022843. The cubic root of 1105212545 is about 1033.9080941101.

Adding to 1105212545 its reverse (5452125011), we get a palindrome (6557337556).

The spelling of 1105212545 in words is "one billion, one hundred five million, two hundred twelve thousand, five hundred forty-five".