1403000021 has 8 divisors (see below), whose sum is σ = 1487940480. Its totient is φ = 1318327488.

The previous prime is 1403000017. The next prime is 1403000051. The reversal of 1403000021 is 1200003041.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1403000021 - 2² = 1403000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1402999966 and 1403000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403000051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56141 + ... + 77186.

It is an arithmetic number, because the mean of its divisors is an integer number (185992560).

Almost surely, 2^1403000021 is an apocalyptic number.

It is an amenable number.

1403000021 is a deficient number, since it is larger than the sum of its proper divisors (84940459).

1403000021 is a wasteful number, since it uses less digits than its factorization.

1403000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133963.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1403000021 is about 37456.6418809802. The cubic root of 1403000021 is about 1119.4874411158.

Adding to 1403000021 its reverse (1200003041), we get a palindrome (2603003062).

The spelling of 1403000021 in words is "one billion, four hundred three million, twenty-one", and thus it is an aban number.