1401209421 has 8 divisors (see below), whose sum is σ = 1868553024. Its totient is φ = 934002720.

The previous prime is 1401209413. The next prime is 1401209429. The reversal of 1401209421 is 1249021041.

It is an interprime number because it is at equal distance from previous prime (1401209413) and next prime (1401209429).

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

It is not a de Polignac number, because 1401209421 - 2³ = 1401209413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1401209391 and 1401209400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401209429) 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, 7320 + ... + 53441.

It is an arithmetic number, because the mean of its divisors is an integer number (233569128).

Almost surely, 2^1401209421 is an apocalyptic number.

It is an amenable number.

1401209421 is a deficient number, since it is larger than the sum of its proper divisors (467343603).

1401209421 is an equidigital number, since it uses as much as digits as its factorization.

1401209421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68451.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1401209421 is about 37432.7319467869. The cubic root of 1401209421 is about 1119.0109841027.

The spelling of 1401209421 in words is "one billion, four hundred one million, two hundred nine thousand, four hundred twenty-one".