401432421 has 16 divisors (see below), whose sum is σ = 576779840. Its totient is φ = 246879360.

The previous prime is 401432419. The next prime is 401432459. The reversal of 401432421 is 124234104.

It is not a de Polignac number, because 401432421 - 2¹ = 401432419 is a prime.

It is a super-2 number, since 2×401432421² = 322295977259842482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401432411) 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, 104625 + ... + 108393.

It is an arithmetic number, because the mean of its divisors is an integer number (36048740).

Almost surely, 2^401432421 is an apocalyptic number.

It is an amenable number.

401432421 is a deficient number, since it is larger than the sum of its proper divisors (175347419).

401432421 is a wasteful number, since it uses less digits than its factorization.

401432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 401432421 is about 20035.7785224333. The cubic root of 401432421 is about 737.6847659637.

Adding to 401432421 its reverse (124234104), we get a palindrome (525666525).

The spelling of 401432421 in words is "four hundred one million, four hundred thirty-two thousand, four hundred twenty-one".