1421351481 has 8 divisors (see below), whose sum is σ = 2067420384. Its totient is φ = 861425120.

The previous prime is 1421351479. The next prime is 1421351501. The reversal of 1421351481 is 1841531241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1421351481 - 2¹ = 1421351479 is a prime.

It is a super-2 number, since 2×1421351481² = 4040480065081786722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1421352481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21535596 + ... + 21535661.

It is an arithmetic number, because the mean of its divisors is an integer number (258427548).

Almost surely, 2^1421351481 is an apocalyptic number.

1421351481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421351481 is a deficient number, since it is larger than the sum of its proper divisors (646068903).

1421351481 is a wasteful number, since it uses less digits than its factorization.

1421351481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43071271.

The product of its digits is 3840, while the sum is 30.

The square root of 1421351481 is about 37700.8153890602. The cubic root of 1421351481 is about 1124.3473365941.

The spelling of 1421351481 in words is "one billion, four hundred twenty-one million, three hundred fifty-one thousand, four hundred eighty-one".