400013142 has 32 divisors (see below), whose sum is σ = 824681472. Its totient is φ = 129255264.

The previous prime is 400013123. The next prime is 400013143. The reversal of 400013142 is 241310004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400013143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59643 + ... + 66009.

It is an arithmetic number, because the mean of its divisors is an integer number (25771296).

Almost surely, 2^400013142 is an apocalyptic number.

400013142 is an abundant number, since it is smaller than the sum of its proper divisors (424668330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400013142 is a wasteful number, since it uses less digits than its factorization.

400013142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400013142 is about 20000.3285473014. The cubic root of 400013142 is about 736.8143688967.

Adding to 400013142 its reverse (241310004), we get a palindrome (641323146).

The spelling of 400013142 in words is "four hundred million, thirteen thousand, one hundred forty-two".