1401172140 has 24 divisors (see below), whose sum is σ = 3923282160. Its totient is φ = 373645888.

The previous prime is 1401172099. The next prime is 1401172141. The reversal of 1401172140 is 412711041.

It is not an unprimeable number, because it can be changed into a prime (1401172141) 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, 11676375 + ... + 11676494.

It is an arithmetic number, because the mean of its divisors is an integer number (163470090).

Almost surely, 2^1401172140 is an apocalyptic number.

1401172140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401172140 is an abundant number, since it is smaller than the sum of its proper divisors (2522110020).

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

1401172140 is a wasteful number, since it uses less digits than its factorization.

1401172140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23352881 (or 23352879 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1401172140 is about 37432.2339702027. The cubic root of 1401172140 is about 1119.0010597669.

Adding to 1401172140 its reverse (412711041), we get a palindrome (1813883181).

The spelling of 1401172140 in words is "one billion, four hundred one million, one hundred seventy-two thousand, one hundred forty".