1042643515 has 4 divisors (see below), whose sum is σ = 1251172224. Its totient is φ = 834114808.

The previous prime is 1042643509. The next prime is 1042643519. The reversal of 1042643515 is 5153462401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5153462401 = 26339 ⋅195659.

It is a cyclic number.

It is not a de Polignac number, because 1042643515 - 2²¹ = 1040546363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042643519) 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, 104264347 + ... + 104264356.

It is an arithmetic number, because the mean of its divisors is an integer number (312793056).

Almost surely, 2^1042643515 is an apocalyptic number.

1042643515 is a deficient number, since it is larger than the sum of its proper divisors (208528709).

1042643515 is an equidigital number, since it uses as much as digits as its factorization.

1042643515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208528708.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1042643515 is about 32289.9909414667. The cubic root of 1042643515 is about 1014.0171076687.

The spelling of 1042643515 in words is "one billion, forty-two million, six hundred forty-three thousand, five hundred fifteen".