1420244521 has 4 divisors (see below), whose sum is σ = 1469218500. Its totient is φ = 1371270544.

The previous prime is 1420244479. The next prime is 1420244563. The reversal of 1420244521 is 1254420241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1254420241 = 449 ⋅2793809.

It is an interprime number because it is at equal distance from previous prime (1420244479) and next prime (1420244563).

It can be written as a sum of positive squares in 2 ways, for example, as 1153281600 + 266962921 = 33960^2 + 16339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420244521 - 2⁷ = 1420244393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420244621) 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, 24486946 + ... + 24487003.

It is an arithmetic number, because the mean of its divisors is an integer number (367304625).

Almost surely, 2^1420244521 is an apocalyptic number.

It is an amenable number.

1420244521 is a deficient number, since it is larger than the sum of its proper divisors (48973979).

1420244521 is an equidigital number, since it uses as much as digits as its factorization.

1420244521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48973978.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1420244521 is about 37686.1316799695. The cubic root of 1420244521 is about 1124.0553771955.

Adding to 1420244521 its reverse (1254420241), we get a palindrome (2674664762).

The spelling of 1420244521 in words is "one billion, four hundred twenty million, two hundred forty-four thousand, five hundred twenty-one".