406247142 has 64 divisors (see below), whose sum is σ = 956736000. Its totient is φ = 114942240.

The previous prime is 406247119. The next prime is 406247143. The reversal of 406247142 is 241742604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406247143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223417 + ... + 225227.

It is an arithmetic number, because the mean of its divisors is an integer number (14949000).

Almost surely, 2^406247142 is an apocalyptic number.

406247142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 406247142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478368000).

406247142 is an abundant number, since it is smaller than the sum of its proper divisors (550488858).

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

406247142 is a wasteful number, since it uses less digits than its factorization.

406247142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 406247142 is about 20155.5734723674. The cubic root of 406247142 is about 740.6222803155.

Adding to 406247142 its reverse (241742604), we get a palindrome (647989746).

The spelling of 406247142 in words is "four hundred six million, two hundred forty-seven thousand, one hundred forty-two".