401520545 has 16 divisors (see below), whose sum is σ = 503926272. Its totient is φ = 306546240.

The previous prime is 401520523. The next prime is 401520557. The reversal of 401520545 is 545025104.

It is not a de Polignac number, because 401520545 - 2⁸ = 401520289 is a prime.

It is a super-2 number, since 2×401520545² = 322437496114194050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49475 + ... + 57015.

It is an arithmetic number, because the mean of its divisors is an integer number (31495392).

Almost surely, 2^401520545 is an apocalyptic number.

It is an amenable number.

401520545 is a deficient number, since it is larger than the sum of its proper divisors (102405727).

401520545 is a wasteful number, since it uses less digits than its factorization.

401520545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8032.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 401520545 is about 20037.9775676090. The cubic root of 401520545 is about 737.7387418200.

Adding to 401520545 its reverse (545025104), we get a palindrome (946545649).

The spelling of 401520545 in words is "four hundred one million, five hundred twenty thousand, five hundred forty-five".