1521314421 has 8 divisors (see below), whose sum is σ = 2212821024. Its totient is φ = 922008720.

The previous prime is 1521314413. The next prime is 1521314423. The reversal of 1521314421 is 1244131251.

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

It is not a de Polignac number, because 1521314421 - 2³ = 1521314413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1521314391 and 1521314400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521314423) 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, 23050186 + ... + 23050251.

It is an arithmetic number, because the mean of its divisors is an integer number (276602628).

Almost surely, 2^1521314421 is an apocalyptic number.

1521314421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1521314421 is a deficient number, since it is larger than the sum of its proper divisors (691506603).

1521314421 is a wasteful number, since it uses less digits than its factorization.

1521314421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46100451.

The product of its digits is 960, while the sum is 24.

The square root of 1521314421 is about 39004.0308301591. The cubic root of 1521314421 is about 1150.1107444705.

Adding to 1521314421 its reverse (1244131251), we get a palindrome (2765445672).

The spelling of 1521314421 in words is "one billion, five hundred twenty-one million, three hundred fourteen thousand, four hundred twenty-one".