1315956445 has 4 divisors (see below), whose sum is σ = 1579147740. Its totient is φ = 1052765152.

The previous prime is 1315956437. The next prime is 1315956449. The reversal of 1315956445 is 5446595131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5446595131 = 1871 ⋅2911061.

It can be written as a sum of positive squares in 2 ways, for example, as 253000836 + 1062955609 = 15906^2 + 32603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315956445 - 2³ = 1315956437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315956449) 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, 131595640 + ... + 131595649.

It is an arithmetic number, because the mean of its divisors is an integer number (394786935).

Almost surely, 2^1315956445 is an apocalyptic number.

It is an amenable number.

1315956445 is a deficient number, since it is larger than the sum of its proper divisors (263191295).

1315956445 is an equidigital number, since it uses as much as digits as its factorization.

1315956445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263191294.

The product of its digits is 324000, while the sum is 43.

The square root of 1315956445 is about 36276.1139732469. The cubic root of 1315956445 is about 1095.8400578781.

The spelling of 1315956445 in words is "one billion, three hundred fifteen million, nine hundred fifty-six thousand, four hundred forty-five".