1045028781 has 12 divisors (see below), whose sum is σ = 1510355808. Its totient is φ = 696284424.

The previous prime is 1045028753. The next prime is 1045028797. The reversal of 1045028781 is 1878205401.

It is not a de Polignac number, because 1045028781 - 2¹⁷ = 1044897709 is a prime.

It is a super-2 number, since 2×1045028781² = 2184170306236691922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045028741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16515 + ... + 48608.

It is an arithmetic number, because the mean of its divisors is an integer number (125862984).

Almost surely, 2^1045028781 is an apocalyptic number.

It is an amenable number.

1045028781 is a deficient number, since it is larger than the sum of its proper divisors (465327027).

1045028781 is a wasteful number, since it uses less digits than its factorization.

1045028781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66912 (or 66909 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1045028781 is about 32326.9049090692. The cubic root of 1045028781 is about 1014.7897777801.

The spelling of 1045028781 in words is "one billion, forty-five million, twenty-eight thousand, seven hundred eighty-one".