1415221040 has 80 divisors (see below), whose sum is σ = 3358713600. Its totient is φ = 554459136.

The previous prime is 1415221033. The next prime is 1415221043. The reversal of 1415221040 is 401225141.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1415221043) 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, 803681 + ... + 805439.

It is an arithmetic number, because the mean of its divisors is an integer number (41983920).

Almost surely, 2^1415221040 is an apocalyptic number.

1415221040 is a gapful number since it is divisible by the number (10) 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 1415221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1679356800).

1415221040 is an abundant number, since it is smaller than the sum of its proper divisors (1943492560).

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

1415221040 is a wasteful number, since it uses less digits than its factorization.

1415221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1415221040 is about 37619.4237063781. The cubic root of 1415221040 is about 1122.7285302135.

Adding to 1415221040 its reverse (401225141), we get a palindrome (1816446181).

The spelling of 1415221040 in words is "one billion, four hundred fifteen million, two hundred twenty-one thousand, forty".