1297653145 has 8 divisors (see below), whose sum is σ = 1557770760. Its totient is φ = 1037731200.

The previous prime is 1297653109. The next prime is 1297653167. The reversal of 1297653145 is 5413567921.

It can be written as a sum of positive squares in 4 ways, for example, as 305970064 + 991683081 = 17492^2 + 31491^2 .

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

It is not a de Polignac number, because 1297653145 - 2⁷ = 1297653017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33906 + ... + 61195.

It is an arithmetic number, because the mean of its divisors is an integer number (194721345).

Almost surely, 2^1297653145 is an apocalyptic number.

It is an amenable number.

1297653145 is a deficient number, since it is larger than the sum of its proper divisors (260117615).

1297653145 is an equidigital number, since it uses as much as digits as its factorization.

1297653145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97835.

The product of its digits is 226800, while the sum is 43.

The square root of 1297653145 is about 36022.9530299780. The cubic root of 1297653145 is about 1090.7357333947.

The spelling of 1297653145 in words is "one billion, two hundred ninety-seven million, six hundred fifty-three thousand, one hundred forty-five".