1401421831 has 2 divisors, whose sum is σ = 1401421832. Its totient is φ = 1401421830.

The previous prime is 1401421793. The next prime is 1401421837. The reversal of 1401421831 is 1381241041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1401421831 - 2¹³ = 1401413639 is a prime.

It is a super-2 number, since 2×1401421831² = 3927966296806785122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401421796 and 1401421805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401421837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700710915 + 700710916.

It is an arithmetic number, because the mean of its divisors is an integer number (700710916).

Almost surely, 2^1401421831 is an apocalyptic number.

1401421831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401421831 is an equidigital number, since it uses as much as digits as its factorization.

1401421831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1401421831 is about 37435.5690620565. The cubic root of 1401421831 is about 1119.0675250475.

Adding to 1401421831 its reverse (1381241041), we get a palindrome (2782662872).

The spelling of 1401421831 in words is "one billion, four hundred one million, four hundred twenty-one thousand, eight hundred thirty-one".