254252646421 has 4 divisors (see below), whose sum is σ = 256108505292. Its totient is φ = 252396787552.

The previous prime is 254252646407. The next prime is 254252646457. The reversal of 254252646421 is 124646252452.

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 120607565796 + 133645080625 = 347286^2 + 365575^2 .

It is a cyclic number.

It is not a de Polignac number, because 254252646421 - 2²⁷ = 254118428693 is a prime.

It is a super-3 number, since 3×254252646421³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254252646491) 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, 927929230 + ... + 927929503.

It is an arithmetic number, because the mean of its divisors is an integer number (64027126323).

Almost surely, 2^254252646421 is an apocalyptic number.

It is an amenable number.

254252646421 is a deficient number, since it is larger than the sum of its proper divisors (1855858871).

254252646421 is a wasteful number, since it uses less digits than its factorization.

254252646421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855858870.

The product of its digits is 921600, while the sum is 43.

Adding to 254252646421 its reverse (124646252452), we get a palindrome (378898898873).

The spelling of 254252646421 in words is "two hundred fifty-four billion, two hundred fifty-two million, six hundred forty-six thousand, four hundred twenty-one".