1261002373 has 2 divisors, whose sum is σ = 1261002374. Its totient is φ = 1261002372.

The previous prime is 1261002367. The next prime is 1261002397. The reversal of 1261002373 is 3732001621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 916454529 + 344547844 = 30273^2 + 18562^2 .

It is an emirp because it is prime and its reverse (3732001621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261002373 - 2²⁵ = 1227447941 is a prime.

It is a super-2 number, since 2×1261002373² = 3180253969423262258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261002313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630501186 + 630501187.

It is an arithmetic number, because the mean of its divisors is an integer number (630501187).

Almost surely, 2^1261002373 is an apocalyptic number.

It is an amenable number.

1261002373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261002373 is an equidigital number, since it uses as much as digits as its factorization.

1261002373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1261002373 is about 35510.5952217081. The cubic root of 1261002373 is about 1080.3686364475.

Adding to 1261002373 its reverse (3732001621), we get a palindrome (4993003994).

The spelling of 1261002373 in words is "one billion, two hundred sixty-one million, two thousand, three hundred seventy-three".