1421306544 has 120 divisors (see below), whose sum is σ = 4282897008. Its totient is φ = 404974080.

The previous prime is 1421306389. The next prime is 1421306587. The reversal of 1421306544 is 4456031241.

It is a super-2 number, since 2×1421306544² = 4040224584034447872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1271874 + ... + 1272990.

Almost surely, 2^1421306544 is an apocalyptic number.

1421306544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421306544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141448504).

1421306544 is an abundant number, since it is smaller than the sum of its proper divisors (2861590464).

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

1421306544 is a wasteful number, since it uses less digits than its factorization.

1421306544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1421306544 is about 37700.2194158071. The cubic root of 1421306544 is about 1124.3354874657.

Adding to 1421306544 its reverse (4456031241), we get a palindrome (5877337785).

The spelling of 1421306544 in words is "one billion, four hundred twenty-one million, three hundred six thousand, five hundred forty-four".