1262672641 has 4 divisors (see below), whose sum is σ = 1263228484. Its totient is φ = 1262116800.

The previous prime is 1262672639. The next prime is 1262672647. The reversal of 1262672641 is 1462762621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1115560000 + 147112641 = 33400^2 + 12129^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262672641 - 2¹ = 1262672639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1262672641.

It is not an unprimeable number, because it can be changed into a prime (1262672647) 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, 274500 + ... + 279061.

It is an arithmetic number, because the mean of its divisors is an integer number (315807121).

Almost surely, 2^1262672641 is an apocalyptic number.

It is an amenable number.

1262672641 is a deficient number, since it is larger than the sum of its proper divisors (555843).

1262672641 is an equidigital number, since it uses as much as digits as its factorization.

1262672641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555842.

The product of its digits is 48384, while the sum is 37.

The square root of 1262672641 is about 35534.1053215077. The cubic root of 1262672641 is about 1080.8454288426.

The spelling of 1262672641 in words is "one billion, two hundred sixty-two million, six hundred seventy-two thousand, six hundred forty-one".