1401231421 has 4 divisors (see below), whose sum is σ = 1404040000. Its totient is φ = 1398422844.

The previous prime is 1401231407. The next prime is 1401231431. The reversal of 1401231421 is 1241321041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1401231421 - 2¹¹ = 1401229373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401231431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403541 + ... + 1404538.

It is an arithmetic number, because the mean of its divisors is an integer number (351010000).

Almost surely, 2^1401231421 is an apocalyptic number.

It is an amenable number.

1401231421 is a deficient number, since it is larger than the sum of its proper divisors (2808579).

1401231421 is an equidigital number, since it uses as much as digits as its factorization.

1401231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808578.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1401231421 is about 37433.0258060980. The cubic root of 1401231421 is about 1119.0168404989.

Adding to 1401231421 its reverse (1241321041), we get a palindrome (2642552462).

The spelling of 1401231421 in words is "one billion, four hundred one million, two hundred thirty-one thousand, four hundred twenty-one".