401224525 has 12 divisors (see below), whose sum is σ = 535789492. Its totient is φ = 296288640.

The previous prime is 401224519. The next prime is 401224547. The reversal of 401224525 is 525422104.

It can be written as a sum of positive squares in 6 ways, for example, as 73650724 + 327573801 = 8582^2 + 18099^2 .

It is not a de Polignac number, because 401224525 - 2³ = 401224517 is a prime.

It is a super-2 number, since 2×401224525² = 321962238922951250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401224525.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 616944 + ... + 617593.

Almost surely, 2^401224525 is an apocalyptic number.

It is an amenable number.

401224525 is a deficient number, since it is larger than the sum of its proper divisors (134564967).

401224525 is a wasteful number, since it uses less digits than its factorization.

401224525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234560 (or 1234555 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 401224525 is about 20030.5897317079. The cubic root of 401224525 is about 737.5573985777.

Adding to 401224525 its reverse (525422104), we get a palindrome (926646629).

The spelling of 401224525 in words is "four hundred one million, two hundred twenty-four thousand, five hundred twenty-five".