1426521726 has 64 divisors (see below), whose sum is σ = 3663705600. Its totient is φ = 402988608.

The previous prime is 1426521641. The next prime is 1426521727. The reversal of 1426521726 is 6271256241.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426521727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12441 + ... + 54843.

It is an arithmetic number, because the mean of its divisors is an integer number (57245400).

Almost surely, 2^1426521726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1426521726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831852800).

1426521726 is an abundant number, since it is smaller than the sum of its proper divisors (2237183874).

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

1426521726 is a wasteful number, since it uses less digits than its factorization.

1426521726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42510 (or 42504 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1426521726 is about 37769.3225515100. The cubic root of 1426521726 is about 1125.7089788830.

Adding to 1426521726 its reverse (6271256241), we get a palindrome (7697777967).

The spelling of 1426521726 in words is "one billion, four hundred twenty-six million, five hundred twenty-one thousand, seven hundred twenty-six".