401243503 has 16 divisors (see below), whose sum is σ = 442887264. Its totient is φ = 361912320.

The previous prime is 401243489. The next prime is 401243519. The reversal of 401243503 is 305342104.

It is not a de Polignac number, because 401243503 - 2⁵ = 401243471 is a prime.

It is a super-2 number, since 2×401243503² = 321992697399422018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401240503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37383 + ... + 46903.

It is an arithmetic number, because the mean of its divisors is an integer number (27680454).

Almost surely, 2^401243503 is an apocalyptic number.

401243503 is a deficient number, since it is larger than the sum of its proper divisors (41643761).

401243503 is a wasteful number, since it uses less digits than its factorization.

401243503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 401243503 is about 20031.0634515494. The cubic root of 401243503 is about 737.5690272650.

Adding to 401243503 its reverse (305342104), we get a palindrome (706585607).

The spelling of 401243503 in words is "four hundred one million, two hundred forty-three thousand, five hundred three".