1245331201 has 2 divisors, whose sum is σ = 1245331202. Its totient is φ = 1245331200.

The previous prime is 1245331187. The next prime is 1245331319. The reversal of 1245331201 is 1021335421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240730176 + 4601025 = 35224^2 + 2145^2 .

It is an emirp because it is prime and its reverse (1021335421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245331201 - 2⁵ = 1245331169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245331501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622665600 + 622665601.

It is an arithmetic number, because the mean of its divisors is an integer number (622665601).

Almost surely, 2^1245331201 is an apocalyptic number.

It is an amenable number.

1245331201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245331201 is an equidigital number, since it uses as much as digits as its factorization.

1245331201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1245331201 is about 35289.2505021005. The cubic root of 1245331201 is about 1075.8745221235.

Adding to 1245331201 its reverse (1021335421), we get a palindrome (2266666622).

The spelling of 1245331201 in words is "one billion, two hundred forty-five million, three hundred thirty-one thousand, two hundred one".