1262505426 has 128 divisors (see below), whose sum is σ = 3299788800. Its totient is φ = 312698880.

The previous prime is 1262505403. The next prime is 1262505449. The reversal of 1262505426 is 6245052621.

It is an interprime number because it is at equal distance from previous prime (1262505403) and next prime (1262505449).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1358530 + ... + 1359458.

It is an arithmetic number, because the mean of its divisors is an integer number (25779600).

Almost surely, 2^1262505426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1262505426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649894400).

1262505426 is an abundant number, since it is smaller than the sum of its proper divisors (2037283374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1262505426 is a wasteful number, since it uses less digits than its factorization.

1262505426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 1262505426 is about 35531.7523632033. The cubic root of 1262505426 is about 1080.7977148268.

The spelling of 1262505426 in words is "one billion, two hundred sixty-two million, five hundred five thousand, four hundred twenty-six".