406401252 has 24 divisors (see below), whose sum is σ = 1004050656. Its totient is φ = 127498368.

The previous prime is 406401199. The next prime is 406401253. The reversal of 406401252 is 252104604.

It is not an unprimeable number, because it can be changed into a prime (406401253) 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, 995878 + ... + 996285.

It is an arithmetic number, because the mean of its divisors is an integer number (41835444).

Almost surely, 2^406401252 is an apocalyptic number.

It is an amenable number.

406401252 is an abundant number, since it is smaller than the sum of its proper divisors (597649404).

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

406401252 is a wasteful number, since it uses less digits than its factorization.

406401252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992187 (or 1992185 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 406401252 is about 20159.3961219080. The cubic root of 406401252 is about 740.7159202522.

Adding to 406401252 its reverse (252104604), we get a palindrome (658505856).

The spelling of 406401252 in words is "four hundred six million, four hundred one thousand, two hundred fifty-two".