1049730257 has 4 divisors (see below), whose sum is σ = 1075333476. Its totient is φ = 1024127040.

The previous prime is 1049730251. The next prime is 1049730271. The reversal of 1049730257 is 7520379401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7520379401 = 8263 ⋅910127.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 1005587521 = 6644^2 + 31711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1049730257 - 2¹⁸ = 1049468113 is a prime.

It is a super-2 number, since 2×1049730257² = 2203867224922572098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1049730257.

It is not an unprimeable number, because it can be changed into a prime (1049730251) 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, 12801548 + ... + 12801629.

It is an arithmetic number, because the mean of its divisors is an integer number (268833369).

Almost surely, 2^1049730257 is an apocalyptic number.

It is an amenable number.

1049730257 is a deficient number, since it is larger than the sum of its proper divisors (25603219).

1049730257 is an equidigital number, since it uses as much as digits as its factorization.

1049730257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25603218.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1049730257 is about 32399.5409998352. The cubic root of 1049730257 is about 1016.3093125979.

The spelling of 1049730257 in words is "one billion, forty-nine million, seven hundred thirty thousand, two hundred fifty-seven".