1401540121 has 4 divisors (see below), whose sum is σ = 1462476672. Its totient is φ = 1340603572.

The previous prime is 1401540083. The next prime is 1401540137. The reversal of 1401540121 is 1210451041.

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: 1210451041 = 37 ⋅32714893.

It is a cyclic number.

It is not a de Polignac number, because 1401540121 - 2⁹ = 1401539609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401540191) 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, 30468241 + ... + 30468286.

It is an arithmetic number, because the mean of its divisors is an integer number (365619168).

Almost surely, 2^1401540121 is an apocalyptic number.

It is an amenable number.

1401540121 is a deficient number, since it is larger than the sum of its proper divisors (60936551).

1401540121 is an equidigital number, since it uses as much as digits as its factorization.

1401540121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60936550.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1401540121 is about 37437.1489432622. The cubic root of 1401540121 is about 1119.0990099224.

Adding to 1401540121 its reverse (1210451041), we get a palindrome (2611991162).

The spelling of 1401540121 in words is "one billion, four hundred one million, five hundred forty thousand, one hundred twenty-one".