1240134353 has 4 divisors (see below), whose sum is σ = 1242723840. Its totient is φ = 1237544868.

The previous prime is 1240134341. The next prime is 1240134383. The reversal of 1240134353 is 3534310421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3534310421 = 17 ⋅207900613.

It is a cyclic number.

It is not a de Polignac number, because 1240134353 - 2⁸ = 1240134097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240134383) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1294025 + ... + 1294982.

It is an arithmetic number, because the mean of its divisors is an integer number (310680960).

Almost surely, 2^1240134353 is an apocalyptic number.

It is an amenable number.

1240134353 is a deficient number, since it is larger than the sum of its proper divisors (2589487).

1240134353 is an equidigital number, since it uses as much as digits as its factorization.

1240134353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589486.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1240134353 is about 35215.5413560547. The cubic root of 1240134353 is about 1074.3758707728.

Adding to 1240134353 its reverse (3534310421), we get a palindrome (4774444774).

The spelling of 1240134353 in words is "one billion, two hundred forty million, one hundred thirty-four thousand, three hundred fifty-three".