1245201131 has 2 divisors, whose sum is σ = 1245201132. Its totient is φ = 1245201130.

The previous prime is 1245201079. The next prime is 1245201137. The reversal of 1245201131 is 1311025421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1245201131 - 2¹⁴ = 1245184747 is a prime.

It is a super-2 number, since 2×1245201131² = 3101051713287358322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1245201137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622600565 + 622600566.

It is an arithmetic number, because the mean of its divisors is an integer number (622600566).

Almost surely, 2^1245201131 is an apocalyptic number.

1245201131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245201131 is an equidigital number, since it uses as much as digits as its factorization.

1245201131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1245201131 is about 35287.4075415013. The cubic root of 1245201131 is about 1075.8370638496.

Adding to 1245201131 its reverse (1311025421), we get a palindrome (2556226552).

The spelling of 1245201131 in words is "one billion, two hundred forty-five million, two hundred one thousand, one hundred thirty-one".