1381243515 has 8 divisors (see below), whose sum is σ = 2209989648. Its totient is φ = 736663200.

The previous prime is 1381243511. The next prime is 1381243529. The reversal of 1381243515 is 5153421831.

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

It is not a de Polignac number, because 1381243515 - 2² = 1381243511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381243511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46041436 + ... + 46041465.

It is an arithmetic number, because the mean of its divisors is an integer number (276248706).

Almost surely, 2^1381243515 is an apocalyptic number.

1381243515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1381243515 is a deficient number, since it is larger than the sum of its proper divisors (828746133).

1381243515 is an equidigital number, since it uses as much as digits as its factorization.

1381243515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92082909.

The product of its digits is 14400, while the sum is 33.

The square root of 1381243515 is about 37165.0846225325. The cubic root of 1381243515 is about 1113.6705894273.

The spelling of 1381243515 in words is "one billion, three hundred eighty-one million, two hundred forty-three thousand, five hundred fifteen".