1235221040 has 40 divisors (see below), whose sum is σ = 2964536448. Its totient is φ = 478149120.

The previous prime is 1235221007. The next prime is 1235221051. The reversal of 1235221040 is 401225321.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246557 + ... + 251516.

Almost surely, 2^1235221040 is an apocalyptic number.

1235221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1235221040 is an abundant number, since it is smaller than the sum of its proper divisors (1729315408).

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

1235221040 is a wasteful number, since it uses less digits than its factorization.

1235221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498117 (or 498111 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1235221040 is about 35145.7115449382. The cubic root of 1235221040 is about 1072.9551291070.

Adding to 1235221040 its reverse (401225321), we get a palindrome (1636446361).

The spelling of 1235221040 in words is "one billion, two hundred thirty-five million, two hundred twenty-one thousand, forty".