1045857261 has 48 divisors (see below), whose sum is σ = 1546537920. Its totient is φ = 626745600.

The previous prime is 1045857251. The next prime is 1045857283. The reversal of 1045857261 is 1627585401.

It is not a de Polignac number, because 1045857261 - 2²⁹ = 508986349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045857251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3341241 + ... + 3341553.

It is an arithmetic number, because the mean of its divisors is an integer number (32219540).

Almost surely, 2^1045857261 is an apocalyptic number.

It is an amenable number.

1045857261 is a deficient number, since it is larger than the sum of its proper divisors (500680659).

1045857261 is a wasteful number, since it uses less digits than its factorization.

1045857261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 1045857261 is about 32339.7164644343. The cubic root of 1045857261 is about 1015.0578759657.

The spelling of 1045857261 in words is "one billion, forty-five million, eight hundred fifty-seven thousand, two hundred sixty-one".