1213040135 has 8 divisors (see below), whose sum is σ = 1457758896. Its totient is φ = 969024960.

The previous prime is 1213040131. The next prime is 1213040201. The reversal of 1213040135 is 5310403121.

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

It is not a de Polignac number, because 1213040135 - 2² = 1213040131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213040131) 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, 172094 + ... + 179003.

It is an arithmetic number, because the mean of its divisors is an integer number (182219862).

Almost surely, 2^1213040135 is an apocalyptic number.

1213040135 is a deficient number, since it is larger than the sum of its proper divisors (244718761).

1213040135 is an equidigital number, since it uses as much as digits as its factorization.

1213040135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351793.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1213040135 is about 34828.7257159948. The cubic root of 1213040135 is about 1066.4939351920.

Adding to 1213040135 its reverse (5310403121), we get a palindrome (6523443256).

The spelling of 1213040135 in words is "one billion, two hundred thirteen million, forty thousand, one hundred thirty-five".