1345121053 has 4 divisors (see below), whose sum is σ = 1345274368. Its totient is φ = 1344967740.

The previous prime is 1345120963. The next prime is 1345121087. The reversal of 1345121053 is 3501215431.

It is a happy number.

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: 3501215431 = 7 ⋅500173633.

It is a cyclic number.

It is not a de Polignac number, because 1345121053 - 2⁹ = 1345120541 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 (1345127053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62643 + ... + 81328.

It is an arithmetic number, because the mean of its divisors is an integer number (336318592).

Almost surely, 2^1345121053 is an apocalyptic number.

It is an amenable number.

1345121053 is a deficient number, since it is larger than the sum of its proper divisors (153315).

1345121053 is an equidigital number, since it uses as much as digits as its factorization.

1345121053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153314.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1345121053 is about 36675.8919864262. The cubic root of 1345121053 is about 1103.8764206195.

Adding to 1345121053 its reverse (3501215431), we get a palindrome (4846336484).

The spelling of 1345121053 in words is "one billion, three hundred forty-five million, one hundred twenty-one thousand, fifty-three".