1345257101 has 4 divisors (see below), whose sum is σ = 1345542912. Its totient is φ = 1344971292.

The previous prime is 1345257061. The next prime is 1345257127. The reversal of 1345257101 is 1017525431.

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.

It is a cyclic number.

It is not a de Polignac number, because 1345257101 - 2¹⁸ = 1344994957 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 (1345257131) 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, 135725 + ... + 145298.

It is an arithmetic number, because the mean of its divisors is an integer number (336385728).

Almost surely, 2^1345257101 is an apocalyptic number.

It is an amenable number.

1345257101 is a deficient number, since it is larger than the sum of its proper divisors (285811).

1345257101 is an equidigital number, since it uses as much as digits as its factorization.

1345257101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285810.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 1345257101 is about 36677.7466728805. The cubic root of 1345257101 is about 1103.9136353907.

The spelling of 1345257101 in words is "one billion, three hundred forty-five million, two hundred fifty-seven thousand, one hundred one".