400321142 has 16 divisors (see below), whose sum is σ = 661713360. Its totient is φ = 180466272.

The previous prime is 400321121. The next prime is 400321147. The reversal of 400321142 is 241123004.

It is a self number, because there is not a number n which added to its sum of digits gives 400321142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400321147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177917 + ... + 180152.

It is an arithmetic number, because the mean of its divisors is an integer number (41357085).

Almost surely, 2^400321142 is an apocalyptic number.

400321142 is a deficient number, since it is larger than the sum of its proper divisors (261392218).

400321142 is a wasteful number, since it uses less digits than its factorization.

400321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358127.

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

The square root of 400321142 is about 20008.0269392062. The cubic root of 400321142 is about 737.0034298558.

Adding to 400321142 its reverse (241123004), we get a palindrome (641444146).

The spelling of 400321142 in words is "four hundred million, three hundred twenty-one thousand, one hundred forty-two".