254003402421 has 16 divisors (see below), whose sum is σ = 398436710400. Its totient is φ = 159374683584.

The previous prime is 254003402381. The next prime is 254003402437. The reversal of 254003402421 is 124204300452.

254003402421 is a `hidden beast` number, since 254 + 0 + 0 + 3 + 402 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 254003402421 - 2⁹ = 254003401909 is a prime.

It is a super-2 number, since 2×254003402421² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254003402461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276691701 + ... + 276692618.

It is an arithmetic number, because the mean of its divisors is an integer number (24902294400).

Almost surely, 2^254003402421 is an apocalyptic number.

It is an amenable number.

254003402421 is a deficient number, since it is larger than the sum of its proper divisors (144433307979).

254003402421 is a wasteful number, since it uses less digits than its factorization.

254003402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553384345 (or 553384339 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 254003402421 its reverse (124204300452), we get a palindrome (378207702873).

The spelling of 254003402421 in words is "two hundred fifty-four billion, three million, four hundred two thousand, four hundred twenty-one".