1426242521 has 4 divisors (see below), whose sum is σ = 1555900944. Its totient is φ = 1296584100.

The previous prime is 1426242509. The next prime is 1426242527. The reversal of 1426242521 is 1252426241.

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 a de Polignac number, because none of the positive numbers 2^k-1426242521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1426242527) 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, 64829195 + ... + 64829216.

It is an arithmetic number, because the mean of its divisors is an integer number (388975236).

Almost surely, 2^1426242521 is an apocalyptic number.

1426242521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1426242521 is a deficient number, since it is larger than the sum of its proper divisors (129658423).

1426242521 is a wasteful number, since it uses less digits than its factorization.

1426242521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129658422.

The product of its digits is 7680, while the sum is 29.

The square root of 1426242521 is about 37765.6261830782. The cubic root of 1426242521 is about 1125.6355312148.

Adding to 1426242521 its reverse (1252426241), we get a palindrome (2678668762).

The spelling of 1426242521 in words is "one billion, four hundred twenty-six million, two hundred forty-two thousand, five hundred twenty-one".