1042881645 has 16 divisors (see below), whose sum is σ = 1796965632. Its totient is φ = 513418560.

The previous prime is 1042881613. The next prime is 1042881659. The reversal of 1042881645 is 5461882401.

It is not a de Polignac number, because 1042881645 - 2⁵ = 1042881613 is a prime.

It is a super-3 number, since 3×1042881645³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2673861 + ... + 2674250.

It is an arithmetic number, because the mean of its divisors is an integer number (112310352).

Almost surely, 2^1042881645 is an apocalyptic number.

1042881645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1042881645 is a deficient number, since it is larger than the sum of its proper divisors (754083987).

1042881645 is a wasteful number, since it uses less digits than its factorization.

1042881645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348132.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 1042881645 is about 32293.6780964944. The cubic root of 1042881645 is about 1014.0942991248.

The spelling of 1042881645 in words is "one billion, forty-two million, eight hundred eighty-one thousand, six hundred forty-five".