1245212545 has 8 divisors (see below), whose sum is σ = 1500070824. Its totient is φ = 992292864.

The previous prime is 1245212531. The next prime is 1245212587. The reversal of 1245212545 is 5452125421.

It can be written as a sum of positive squares in 4 ways, for example, as 389825536 + 855387009 = 19744^2 + 29247^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1245212545 - 2⁷ = 1245212417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483234 + ... + 485803.

It is an arithmetic number, because the mean of its divisors is an integer number (187508853).

Almost surely, 2^1245212545 is an apocalyptic number.

It is an amenable number.

1245212545 is a deficient number, since it is larger than the sum of its proper divisors (254858279).

1245212545 is an equidigital number, since it uses as much as digits as its factorization.

1245212545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969299.

The product of its digits is 16000, while the sum is 31.

The square root of 1245212545 is about 35287.5692702119. The cubic root of 1245212545 is about 1075.8403510205.

Adding to 1245212545 its reverse (5452125421), we get a palindrome (6697337966).

The spelling of 1245212545 in words is "one billion, two hundred forty-five million, two hundred twelve thousand, five hundred forty-five".