1421078481 has 6 divisors (see below), whose sum is σ = 2052668930. Its totient is φ = 947385648.

The previous prime is 1421078479. The next prime is 1421078489. The reversal of 1421078481 is 1848701241.

It can be written as a sum of positive squares in only one way, i.e., 1409627025 + 11451456 = 37545^2 + 3384^2 .

It is not a de Polignac number, because 1421078481 - 2¹ = 1421078479 is a prime.

It is a super-2 number, since 2×1421078481² = 4038928098322534722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421078489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78948796 + ... + 78948813.

Almost surely, 2^1421078481 is an apocalyptic number.

It is an amenable number.

1421078481 is a deficient number, since it is larger than the sum of its proper divisors (631590449).

1421078481 is a wasteful number, since it uses less digits than its factorization.

1421078481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157897615 (or 157897612 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 1421078481 is about 37697.1946038429. The cubic root of 1421078481 is about 1124.2753472514.

The spelling of 1421078481 in words is "one billion, four hundred twenty-one million, seventy-eight thousand, four hundred eighty-one".