401340242 has 12 divisors (see below), whose sum is σ = 616341870. Its totient is φ = 196001568.

The previous prime is 401340241. The next prime is 401340253. The reversal of 401340242 is 242043104.

It can be written as a sum of positive squares in only one way, i.e., 249039961 + 152300281 = 15781^2 + 12341^2 .

It is a super-2 number, since 2×401340242² = 322147979697237128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401340241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50567 + ... + 57962.

Almost surely, 2^401340242 is an apocalyptic number.

401340242 is a deficient number, since it is larger than the sum of its proper divisors (215001628).

401340242 is a wasteful number, since it uses less digits than its factorization.

401340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108617 (or 108574 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 401340242 is about 20033.4780305368. The cubic root of 401340242 is about 737.6282979707.

Adding to 401340242 its reverse (242043104), we get a palindrome (643383346).

The spelling of 401340242 in words is "four hundred one million, three hundred forty thousand, two hundred forty-two".