1200426245 has 4 divisors (see below), whose sum is σ = 1440511500. Its totient is φ = 960340992.

The previous prime is 1200426223. The next prime is 1200426247. The reversal of 1200426245 is 5426240021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5426240021 = 89 ⋅60968989.

It can be written as a sum of positive squares in 2 ways, for example, as 890067556 + 310358689 = 29834^2 + 17617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200426245 - 2²⁴ = 1183649029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200426247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120042620 + ... + 120042629.

It is an arithmetic number, because the mean of its divisors is an integer number (360127875).

Almost surely, 2^1200426245 is an apocalyptic number.

It is an amenable number.

1200426245 is a deficient number, since it is larger than the sum of its proper divisors (240085255).

1200426245 is an equidigital number, since it uses as much as digits as its factorization.

1200426245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240085254.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1200426245 is about 34647.1679217797. The cubic root of 1200426245 is about 1062.7843745388.

Adding to 1200426245 its reverse (5426240021), we get a palindrome (6626666266).

The spelling of 1200426245 in words is "one billion, two hundred million, four hundred twenty-six thousand, two hundred forty-five".