1401442121 has 8 divisors (see below), whose sum is σ = 1425013704. Its totient is φ = 1377889920.

The previous prime is 1401442117. The next prime is 1401442183. The reversal of 1401442121 is 1212441041.

It can be written as a sum of positive squares in 4 ways, for example, as 281870521 + 1119571600 = 16789^2 + 33460^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1401442121 - 2² = 1401442117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401442093 and 1401442102.

It is not an unprimeable number, because it can be changed into a prime (1401447121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263141 + ... + 268413.

It is an arithmetic number, because the mean of its divisors is an integer number (178126713).

Almost surely, 2^1401442121 is an apocalyptic number.

It is an amenable number.

1401442121 is a deficient number, since it is larger than the sum of its proper divisors (23571583).

1401442121 is an equidigital number, since it uses as much as digits as its factorization.

1401442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9691.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1401442121 is about 37435.8400600280. The cubic root of 1401442121 is about 1119.0729256985.

Adding to 1401442121 its reverse (1212441041), we get a palindrome (2613883162).

The spelling of 1401442121 in words is "one billion, four hundred one million, four hundred forty-two thousand, one hundred twenty-one".