1425656144221 has 4 divisors (see below), whose sum is σ = 1425937955200. Its totient is φ = 1425374333244.

The previous prime is 1425656144191. The next prime is 1425656144243. The reversal of 1425656144221 is 1224416565241.

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 not a de Polignac number, because 1425656144221 - 2¹⁷ = 1425656013149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425656144251) 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, 140897901 + ... + 140908018.

It is an arithmetic number, because the mean of its divisors is an integer number (356484488800).

Almost surely, 2^{1425656144221} is an apocalyptic number.

It is an amenable number.

1425656144221 is a deficient number, since it is larger than the sum of its proper divisors (281810979).

1425656144221 is an equidigital number, since it uses as much as digits as its factorization.

1425656144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281810978.

The product of its digits is 460800, while the sum is 43.

The spelling of 1425656144221 in words is "one trillion, four hundred twenty-five billion, six hundred fifty-six million, one hundred forty-four thousand, two hundred twenty-one".