1421256654 has 24 divisors (see below), whose sum is σ = 3162617640. Its totient is φ = 460947888.

The previous prime is 1421256631. The next prime is 1421256671. The reversal of 1421256654 is 4566521241.

1421256654 is a `hidden beast` number, since 1 + 42 + 1 + 2 + 566 + 54 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1066344 + ... + 1067675.

It is an arithmetic number, because the mean of its divisors is an integer number (131775735).

Almost surely, 2^1421256654 is an apocalyptic number.

1421256654 is an abundant number, since it is smaller than the sum of its proper divisors (1741360986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421256654 is a wasteful number, since it uses less digits than its factorization.

1421256654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134064 (or 2134061 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 1421256654 is about 37699.5577427640. The cubic root of 1421256654 is about 1124.3223320222.

Adding to 1421256654 its reverse (4566521241), we get a palindrome (5987777895).

The spelling of 1421256654 in words is "one billion, four hundred twenty-one million, two hundred fifty-six thousand, six hundred fifty-four".