1240135403 has 8 divisors (see below), whose sum is σ = 1339885008. Its totient is φ = 1141007904.

The previous prime is 1240135387. The next prime is 1240135411. The reversal of 1240135403 is 3045310421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240135403 - 2⁴ = 1240135387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240135423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151376 + ... + 159357.

It is an arithmetic number, because the mean of its divisors is an integer number (167485626).

Almost surely, 2^1240135403 is an apocalyptic number.

1240135403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1240135403 is a deficient number, since it is larger than the sum of its proper divisors (99749605).

1240135403 is a wasteful number, since it uses less digits than its factorization.

1240135403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311053.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1240135403 is about 35215.5562642421. The cubic root of 1240135403 is about 1074.3761739911.

Adding to 1240135403 its reverse (3045310421), we get a palindrome (4285445824).

The spelling of 1240135403 in words is "one billion, two hundred forty million, one hundred thirty-five thousand, four hundred three".