401240521 has 4 divisors (see below), whose sum is σ = 437716944. Its totient is φ = 364764100.

The previous prime is 401240519. The next prime is 401240563. The reversal of 401240521 is 125042104.

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 401240521 - 2¹ = 401240519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401240501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18238195 + ... + 18238216.

It is an arithmetic number, because the mean of its divisors is an integer number (109429236).

Almost surely, 2^401240521 is an apocalyptic number.

It is an amenable number.

401240521 is a deficient number, since it is larger than the sum of its proper divisors (36476423).

401240521 is a wasteful number, since it uses less digits than its factorization.

401240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36476422.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 401240521 is about 20030.9890170206. The cubic root of 401240521 is about 737.5672000817.

Adding to 401240521 its reverse (125042104), we get a palindrome (526282625).

The spelling of 401240521 in words is "four hundred one million, two hundred forty thousand, five hundred twenty-one".