1210545445 has 4 divisors (see below), whose sum is σ = 1452654540. Its totient is φ = 968436352.

The previous prime is 1210545439. The next prime is 1210545449. The reversal of 1210545445 is 5445450121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445450121 = 269 ⋅20243309.

It can be written as a sum of positive squares in 2 ways, for example, as 308564356 + 901981089 = 17566^2 + 30033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210545445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210545449) 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, 121054540 + ... + 121054549.

It is an arithmetic number, because the mean of its divisors is an integer number (363163635).

Almost surely, 2^1210545445 is an apocalyptic number.

It is an amenable number.

1210545445 is a deficient number, since it is larger than the sum of its proper divisors (242109095).

1210545445 is an equidigital number, since it uses as much as digits as its factorization.

1210545445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242109094.

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

The square root of 1210545445 is about 34792.8935991245. The cubic root of 1210545445 is about 1065.7623304577.

Adding to 1210545445 its reverse (5445450121), we get a palindrome (6655995566).

The spelling of 1210545445 in words is "one billion, two hundred ten million, five hundred forty-five thousand, four hundred forty-five".