401426421 has 16 divisors (see below), whose sum is σ = 593467968. Its totient is φ = 239299200.

The previous prime is 401426411. The next prime is 401426437. The reversal of 401426421 is 124624104.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-401426421 is a prime.

It is a super-2 number, since 2×401426421² = 322286342953738482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401426391 and 401426400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401426411) 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, 97696 + ... + 101721.

It is an arithmetic number, because the mean of its divisors is an integer number (37091748).

Almost surely, 2^401426421 is an apocalyptic number.

It is an amenable number.

401426421 is a deficient number, since it is larger than the sum of its proper divisors (192041547).

401426421 is a wasteful number, since it uses less digits than its factorization.

401426421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199492.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 401426421 is about 20035.6287897336. The cubic root of 401426421 is about 737.6810906829.

The spelling of 401426421 in words is "four hundred one million, four hundred twenty-six thousand, four hundred twenty-one".