1401124240 has 20 divisors (see below), whose sum is σ = 3257614044. Its totient is φ = 560449664.

The previous prime is 1401124229. The next prime is 1401124243. The reversal of 1401124240 is 424211041.

It can be written as a sum of positive squares in 2 ways, for example, as 446561424 + 954562816 = 21132^2 + 30896^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1401124243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8756947 + ... + 8757106.

Almost surely, 2^1401124240 is an apocalyptic number.

1401124240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401124240 is an abundant number, since it is smaller than the sum of its proper divisors (1856489804).

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

1401124240 is a wasteful number, since it uses less digits than its factorization.

1401124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17514066 (or 17514060 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1401124240 is about 37431.5941418476. The cubic root of 1401124240 is about 1118.9883083568.

Adding to 1401124240 its reverse (424211041), we get a palindrome (1825335281).

The spelling of 1401124240 in words is "one billion, four hundred one million, one hundred twenty-four thousand, two hundred forty".