400134142 has 4 divisors (see below), whose sum is σ = 600201216. Its totient is φ = 200067070.

The previous prime is 400134079. The next prime is 400134149. The reversal of 400134142 is 241431004.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400134149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100033534 + ... + 100033537.

It is an arithmetic number, because the mean of its divisors is an integer number (150050304).

Almost surely, 2^400134142 is an apocalyptic number.

400134142 is a deficient number, since it is larger than the sum of its proper divisors (200067074).

400134142 is a wasteful number, since it uses less digits than its factorization.

400134142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200067073.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 400134142 is about 20003.3532688897. The cubic root of 400134142 is about 736.8886544150. Note that the first 3 decimals are identical.

Adding to 400134142 its reverse (241431004), we get a palindrome (641565146).

The spelling of 400134142 in words is "four hundred million, one hundred thirty-four thousand, one hundred forty-two".