1002049045 has 4 divisors (see below), whose sum is σ = 1202458860. Its totient is φ = 801639232.

The previous prime is 1002049021. The next prime is 1002049049. The reversal of 1002049045 is 5409402001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5409402001 = 1451 ⋅3728051.

It can be written as a sum of positive squares in 2 ways, for example, as 783216196 + 218832849 = 27986^2 + 14793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002049045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002049049) 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, 100204900 + ... + 100204909.

It is an arithmetic number, because the mean of its divisors is an integer number (300614715).

Almost surely, 2^1002049045 is an apocalyptic number.

It is an amenable number.

1002049045 is a deficient number, since it is larger than the sum of its proper divisors (200409815).

1002049045 is an equidigital number, since it uses as much as digits as its factorization.

1002049045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200409814.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1002049045 is about 31655.1582684402. The cubic root of 1002049045 is about 1000.6825490208.

The spelling of 1002049045 in words is "one billion, two million, forty-nine thousand, forty-five".