1111212545 has 8 divisors (see below), whose sum is σ = 1365978600. Its totient is φ = 867287680.

The previous prime is 1111212541. The next prime is 1111212611. The reversal of 1111212545 is 5452121111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1056784 + 1110155761 = 1028^2 + 33319^2 .

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

It is not a de Polignac number, because 1111212545 - 2² = 1111212541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111212545.

It is not an unprimeable number, because it can be changed into a prime (1111212541) 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 7 ways as a sum of consecutive naturals, for example, 2710070 + ... + 2710479.

It is an arithmetic number, because the mean of its divisors is an integer number (170747325).

Almost surely, 2^1111212545 is an apocalyptic number.

It is an amenable number.

1111212545 is a deficient number, since it is larger than the sum of its proper divisors (254766055).

1111212545 is an equidigital number, since it uses as much as digits as its factorization.

1111212545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420595.

The product of its digits is 400, while the sum is 23.

The square root of 1111212545 is about 33334.8548069434. The cubic root of 1111212545 is about 1035.7756855599.

Adding to 1111212545 its reverse (5452121111), we get a palindrome (6563333656).

The spelling of 1111212545 in words is "one billion, one hundred eleven million, two hundred twelve thousand, five hundred forty-five".