400412542 has 8 divisors (see below), whose sum is σ = 601320600. Its totient is φ = 199972344.

The previous prime is 400412539. The next prime is 400412549. The reversal of 400412542 is 245214004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400412549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114817 + ... + 118252.

It is an arithmetic number, because the mean of its divisors is an integer number (75165075).

Almost surely, 2^400412542 is an apocalyptic number.

400412542 is a deficient number, since it is larger than the sum of its proper divisors (200908058).

400412542 is a wasteful number, since it uses less digits than its factorization.

400412542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233930.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 400412542 is about 20010.3108921376. The cubic root of 400412542 is about 737.0595156499.

Adding to 400412542 its reverse (245214004), we get a palindrome (645626546).

The spelling of 400412542 in words is "four hundred million, four hundred twelve thousand, five hundred forty-two".