1401403121 has 4 divisors (see below), whose sum is σ = 1475161200. Its totient is φ = 1327645044.

The previous prime is 1401403111. The next prime is 1401403139. The reversal of 1401403121 is 1213041041.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1213041041 = 37 ⋅32784893.

It is a cyclic number.

It is not a de Polignac number, because 1401403121 - 2²² = 1397208817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401403121.

It is not an unprimeable number, because it can be changed into a prime (1401403111) 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, 36879011 + ... + 36879048.

It is an arithmetic number, because the mean of its divisors is an integer number (368790300).

Almost surely, 2^1401403121 is an apocalyptic number.

It is an amenable number.

1401403121 is a deficient number, since it is larger than the sum of its proper divisors (73758079).

1401403121 is an equidigital number, since it uses as much as digits as its factorization.

1401403121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73758078.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1401403121 is about 37435.3191651948. The cubic root of 1401403121 is about 1119.0625449037.

Adding to 1401403121 its reverse (1213041041), we get a palindrome (2614444162).

The spelling of 1401403121 in words is "one billion, four hundred one million, four hundred three thousand, one hundred twenty-one".