1401003021 has 16 divisors (see below), whose sum is σ = 2108093760. Its totient is φ = 819813120.

The previous prime is 1401002987. The next prime is 1401003053. The reversal of 1401003021 is 1203001041.

It is a happy number.

It is not a de Polignac number, because 1401003021 - 2⁶ = 1401002957 is a prime.

It is a super-2 number, since 2×1401003021² = 3925618929702252882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401002988 and 1401003006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401013021) 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 15 ways as a sum of consecutive naturals, for example, 731020 + ... + 732933.

It is an arithmetic number, because the mean of its divisors is an integer number (131755860).

Almost surely, 2^1401003021 is an apocalyptic number.

1401003021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1401003021 is a deficient number, since it is larger than the sum of its proper divisors (707090739).

1401003021 is a wasteful number, since it uses less digits than its factorization.

1401003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463996.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1401003021 is about 37429.9748998046. The cubic root of 1401003021 is about 1118.9560374723.

Adding to 1401003021 its reverse (1203001041), we get a palindrome (2604004062).

The spelling of 1401003021 in words is "one billion, four hundred one million, three thousand, twenty-one".