403651121 has 4 divisors (see below), whose sum is σ = 403968000. Its totient is φ = 403334244.

The previous prime is 403651099. The next prime is 403651151. The reversal of 403651121 is 121156304.

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.

It is a cyclic number.

It is not a de Polignac number, because 403651121 - 2¹⁰ = 403650097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403651151) 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 3 ways as a sum of consecutive naturals, for example, 156521 + ... + 159078.

It is an arithmetic number, because the mean of its divisors is an integer number (100992000).

Almost surely, 2^403651121 is an apocalyptic number.

It is an amenable number.

403651121 is a deficient number, since it is larger than the sum of its proper divisors (316879).

403651121 is a wasteful number, since it uses less digits than its factorization.

403651121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316878.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 403651121 is about 20091.0706782889. The cubic root of 403651121 is about 739.0413206442.

The spelling of 403651121 in words is "four hundred three million, six hundred fifty-one thousand, one hundred twenty-one".