1404410021 has 12 divisors (see below), whose sum is σ = 1643154732. Its totient is φ = 1196814528.

The previous prime is 1404410017. The next prime is 1404410027. The reversal of 1404410021 is 1200144041.

It can be written as a sum of positive squares in 2 ways, for example, as 1128019396 + 276390625 = 33586^2 + 16625^2 .

It is not a de Polignac number, because 1404410021 - 2² = 1404410017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404410027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74360 + ... + 91313.

It is an arithmetic number, because the mean of its divisors is an integer number (136929561).

Almost surely, 2^1404410021 is an apocalyptic number.

It is an amenable number.

1404410021 is a deficient number, since it is larger than the sum of its proper divisors (238744711).

1404410021 is a wasteful number, since it uses less digits than its factorization.

1404410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165860 (or 165853 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1404410021 is about 37475.4589164696. The cubic root of 1404410021 is about 1119.8623398516.

Adding to 1404410021 its reverse (1200144041), we get a palindrome (2604554062).

The spelling of 1404410021 in words is "one billion, four hundred four million, four hundred ten thousand, twenty-one".