1405124140 has 48 divisors (see below), whose sum is σ = 3378477312. Its totient is φ = 480874176.

The previous prime is 1405124129. The next prime is 1405124143. The reversal of 1405124140 is 414215041.

It is not an unprimeable number, because it can be changed into a prime (1405124143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69907 + ... + 87733.

It is an arithmetic number, because the mean of its divisors is an integer number (70384944).

Almost surely, 2^1405124140 is an apocalyptic number.

1405124140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405124140 is an abundant number, since it is smaller than the sum of its proper divisors (1973353172).

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

1405124140 is a wasteful number, since it uses less digits than its factorization.

1405124140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18406 (or 18404 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1405124140 is about 37484.9855275416. The cubic root of 1405124140 is about 1120.0521181104.

Adding to 1405124140 its reverse (414215041), we get a palindrome (1819339181).

Subtracting from 1405124140 its reverse (414215041), we obtain a palindrome (990909099).

The spelling of 1405124140 in words is "one billion, four hundred five million, one hundred twenty-four thousand, one hundred forty".