6401121 has 8 divisors (see below), whose sum is σ = 8578944. Its totient is φ = 4245360.

The previous prime is 6401117. The next prime is 6401123. The reversal of 6401121 is 1211046.

6401121 = T₁₅₀ + T₁₅₁ + ... + T₃₄₆.

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

It is not a de Polignac number, because 6401121 - 2² = 6401117 is a prime.

It is a Curzon number.

6401121 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6401121.

It is not an unprimeable number, because it can be changed into a prime (6401123) 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, 4825 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (1072368).

Almost surely, 2^6401121 is an apocalyptic number.

It is an amenable number.

6401121 is a deficient number, since it is larger than the sum of its proper divisors (2177823).

6401121 is a wasteful number, since it uses less digits than its factorization.

6401121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11031.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 6401121 is about 2530.0436755123. The cubic root of 6401121 is about 185.6743927556.

Adding to 6401121 its reverse (1211046), we get a palindrome (7612167).

The spelling of 6401121 in words is "six million, four hundred one thousand, one hundred twenty-one".