401213124 has 144 divisors (see below), whose sum is σ = 1166780160. Its totient is φ = 115153920.

The previous prime is 401213117. The next prime is 401213143. The reversal of 401213124 is 421312104.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 401213097 and 401213106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1678597 + ... + 1678835.

It is an arithmetic number, because the mean of its divisors is an integer number (8102640).

Almost surely, 2^401213124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401213124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583390080).

401213124 is an abundant number, since it is smaller than the sum of its proper divisors (765567036).

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

401213124 is a wasteful number, since it uses less digits than its factorization.

401213124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 401213124 is about 20030.3051399623. The cubic root of 401213124 is about 737.5504124880.

Adding to 401213124 its reverse (421312104), we get a palindrome (822525228).

The spelling of 401213124 in words is "four hundred one million, two hundred thirteen thousand, one hundred twenty-four".