1401001212 has 72 divisors (see below), whose sum is σ = 3748124016. Its totient is φ = 405709824.

The previous prime is 1401001207. The next prime is 1401001219. The reversal of 1401001212 is 2121001041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401001219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14158 + ... + 54794.

It is an arithmetic number, because the mean of its divisors is an integer number (52057278).

Almost surely, 2^1401001212 is an apocalyptic number.

1401001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401001212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874062008).

1401001212 is an abundant number, since it is smaller than the sum of its proper divisors (2347122804).

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

1401001212 is a wasteful number, since it uses less digits than its factorization.

1401001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40687 (or 40672 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1401001212 is about 37429.9507346724. The cubic root of 1401001212 is about 1118.9555558668.

Adding to 1401001212 its reverse (2121001041), we get a palindrome (3522002253).

The spelling of 1401001212 in words is "one billion, four hundred one million, one thousand, two hundred twelve".