1315123545 has 16 divisors (see below), whose sum is σ = 2113638912. Its totient is φ = 698252160.

The previous prime is 1315123517. The next prime is 1315123547. The reversal of 1315123545 is 5453215131.

It is not a de Polignac number, because 1315123545 - 2¹⁴ = 1315107161 is a prime.

It is a super-2 number, since 2×1315123545² = 3459099877226734050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1315123547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193236 + ... + 199925.

It is an arithmetic number, because the mean of its divisors is an integer number (132102432).

Almost surely, 2^1315123545 is an apocalyptic number.

1315123545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1315123545 is a deficient number, since it is larger than the sum of its proper divisors (798515367).

1315123545 is a wasteful number, since it uses less digits than its factorization.

1315123545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393392.

The product of its digits is 9000, while the sum is 30.

The square root of 1315123545 is about 36264.6321503473. The cubic root of 1315123545 is about 1095.6088147096.

Adding to 1315123545 its reverse (5453215131), we get a palindrome (6768338676).

The spelling of 1315123545 in words is "one billion, three hundred fifteen million, one hundred twenty-three thousand, five hundred forty-five".