1403340021 has 12 divisors (see below), whose sum is σ = 2146284972. Its totient is φ = 880526976.

The previous prime is 1403339983. The next prime is 1403340041. The reversal of 1403340021 is 1200433041.

It can be written as a sum of positive squares in 2 ways, for example, as 375816996 + 1027523025 = 19386^2 + 32055^2 .

It is not a de Polignac number, because 1403340021 - 2¹³ = 1403331829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1403339976 and 1403340003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403340041) 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, 4585926 + ... + 4586231.

It is an arithmetic number, because the mean of its divisors is an integer number (178857081).

Almost surely, 2^1403340021 is an apocalyptic number.

It is an amenable number.

1403340021 is a deficient number, since it is larger than the sum of its proper divisors (742944951).

1403340021 is a wasteful number, since it uses less digits than its factorization.

1403340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172180 (or 9172177 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1403340021 is about 37461.1801869615. The cubic root of 1403340021 is about 1119.5778652027.

Adding to 1403340021 its reverse (1200433041), we get a palindrome (2603773062).

The spelling of 1403340021 in words is "one billion, four hundred three million, three hundred forty thousand, twenty-one".