400242113 has 4 divisors (see below), whose sum is σ = 417643968. Its totient is φ = 382840260.

The previous prime is 400242109. The next prime is 400242119. The reversal of 400242113 is 311242004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400242113 - 2² = 400242109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400242091 and 400242100.

It is not an unprimeable number, because it can be changed into a prime (400242119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8700893 + ... + 8700938.

It is an arithmetic number, because the mean of its divisors is an integer number (104410992).

Almost surely, 2^400242113 is an apocalyptic number.

It is an amenable number.

400242113 is a deficient number, since it is larger than the sum of its proper divisors (17401855).

400242113 is a wasteful number, since it uses less digits than its factorization.

400242113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17401854.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400242113 is about 20006.0519093598. The cubic root of 400242113 is about 736.9549283977.

Adding to 400242113 its reverse (311242004), we get a palindrome (711484117).

The spelling of 400242113 in words is "four hundred million, two hundred forty-two thousand, one hundred thirteen".