425245612721 has 4 divisors (see below), whose sum is σ = 426826451700. Its totient is φ = 423664773744.

The previous prime is 425245612691. The next prime is 425245612723. The reversal of 425245612721 is 127216542524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10792924321 + 414452688400 = 103889^2 + 643780^2 .

It is a cyclic number.

It is not a de Polignac number, because 425245612721 - 2³⁴ = 408065743537 is a prime.

It is a super-2 number, since 2×425245612721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425245612723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790419086 + ... + 790419623.

It is an arithmetic number, because the mean of its divisors is an integer number (106706612925).

Almost surely, 2^425245612721 is an apocalyptic number.

It is an amenable number.

425245612721 is a deficient number, since it is larger than the sum of its proper divisors (1580838979).

425245612721 is a wasteful number, since it uses less digits than its factorization.

425245612721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580838978.

The product of its digits is 268800, while the sum is 41.

The spelling of 425245612721 in words is "four hundred twenty-five billion, two hundred forty-five million, six hundred twelve thousand, seven hundred twenty-one".