1420255253521 has 8 divisors (see below), whose sum is σ = 1529692093160. Its totient is φ = 1310845047552.

The previous prime is 1420255253513. The next prime is 1420255253561. The reversal of 1420255253521 is 1253525520241.

It can be written as a sum of positive squares in 4 ways, for example, as 174439875600 + 1245815377921 = 417660^2 + 1116161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1420255253521 - 2³ = 1420255253513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1420255253561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6547590 + ... + 6761023.

It is an arithmetic number, because the mean of its divisors is an integer number (191211511645).

Almost surely, 2^{1420255253521} is an apocalyptic number.

It is an amenable number.

1420255253521 is a deficient number, since it is larger than the sum of its proper divisors (109436839639).

1420255253521 is a wasteful number, since it uses less digits than its factorization.

1420255253521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13316835.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1420255253521 in words is "one trillion, four hundred twenty billion, two hundred fifty-five million, two hundred fifty-three thousand, five hundred twenty-one".