1262126641 has 4 divisors (see below), whose sum is σ = 1262347632. Its totient is φ = 1261905652.

The previous prime is 1262126639. The next prime is 1262126659. The reversal of 1262126641 is 1466212621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1262126641 - 2¹ = 1262126639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1262126681) 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, 101695 + ... + 113428.

It is an arithmetic number, because the mean of its divisors is an integer number (315586908).

Almost surely, 2^1262126641 is an apocalyptic number.

It is an amenable number.

1262126641 is a deficient number, since it is larger than the sum of its proper divisors (220991).

1262126641 is an equidigital number, since it uses as much as digits as its factorization.

1262126641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220990.

The product of its digits is 6912, while the sum is 31.

The square root of 1262126641 is about 35526.4217308752. The cubic root of 1262126641 is about 1080.6896147206.

The spelling of 1262126641 in words is "one billion, two hundred sixty-two million, one hundred twenty-six thousand, six hundred forty-one".