1400321421 has 12 divisors (see below), whose sum is σ = 2072020860. Its totient is φ = 910777920.

The previous prime is 1400321407. The next prime is 1400321423. The reversal of 1400321421 is 1241230041.

It can be written as a sum of positive squares in 2 ways, for example, as 169364196 + 1230957225 = 13014^2 + 35085^2 .

It is not a de Polignac number, because 1400321421 - 2¹⁸ = 1400059277 is a prime.

It is a super-2 number, since 2×1400321421² = 3921800164222918482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1400321394 and 1400321403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400321423) 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, 1897086 + ... + 1897823.

It is an arithmetic number, because the mean of its divisors is an integer number (172668405).

Almost surely, 2^1400321421 is an apocalyptic number.

It is an amenable number.

1400321421 is a deficient number, since it is larger than the sum of its proper divisors (671699439).

1400321421 is a wasteful number, since it uses less digits than its factorization.

1400321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794956 (or 3794953 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1400321421 is about 37420.8687900214. The cubic root of 1400321421 is about 1118.7745474634.

Adding to 1400321421 its reverse (1241230041), we get a palindrome (2641551462).

The spelling of 1400321421 in words is "one billion, four hundred million, three hundred twenty-one thousand, four hundred twenty-one".