1235133540 has 72 divisors (see below), whose sum is σ = 3751762560. Its totient is φ = 328912704.

The previous prime is 1235133517. The next prime is 1235133583. The reversal of 1235133540 is 453315321.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137301 + ... + 146019.

Almost surely, 2^1235133540 is an apocalyptic number.

1235133540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1235133540 is an abundant number, since it is smaller than the sum of its proper divisors (2516629020).

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

1235133540 is a wasteful number, since it uses less digits than its factorization.

1235133540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521 (or 9516 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1235133540 is about 35144.4667053009. The cubic root of 1235133540 is about 1072.9297933472.

Adding to 1235133540 its reverse (453315321), we get a palindrome (1688448861).

The spelling of 1235133540 in words is "one billion, two hundred thirty-five million, one hundred thirty-three thousand, five hundred forty".