1348729145 has 4 divisors (see below), whose sum is σ = 1618474980. Its totient is φ = 1078983312.

The previous prime is 1348729141. The next prime is 1348729169. The reversal of 1348729145 is 5419278431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 563160361 + 785568784 = 23731^2 + 28028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1348729145 - 2² = 1348729141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1348729096 and 1348729105.

It is not an unprimeable number, because it can be changed into a prime (1348729141) 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, 134872910 + ... + 134872919.

It is an arithmetic number, because the mean of its divisors is an integer number (404618745).

Almost surely, 2^1348729145 is an apocalyptic number.

It is an amenable number.

1348729145 is a deficient number, since it is larger than the sum of its proper divisors (269745835).

1348729145 is an equidigital number, since it uses as much as digits as its factorization.

1348729145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269745834.

The product of its digits is 241920, while the sum is 44.

The square root of 1348729145 is about 36725.0479237264. The cubic root of 1348729145 is about 1104.8625355366.

The spelling of 1348729145 in words is "one billion, three hundred forty-eight million, seven hundred twenty-nine thousand, one hundred forty-five".