1275033749 has 12 divisors (see below), whose sum is σ = 1449814380. Its totient is φ = 1119148800.

The previous prime is 1275033737. The next prime is 1275033761. The reversal of 1275033749 is 9473305721.

It is an interprime number because it is at equal distance from previous prime (1275033737) and next prime (1275033761).

It can be written as a sum of positive squares in 2 ways, for example, as 386397649 + 888636100 = 19657^2 + 29810^2 .

It is not a de Polignac number, because 1275033749 - 2¹² = 1275029653 is a prime.

It is a super-2 number, since 2×1275033749² = 3251422122177990002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275032749) 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, 178172 + ... + 185189.

It is an arithmetic number, because the mean of its divisors is an integer number (120817865).

Almost surely, 2^1275033749 is an apocalyptic number.

It is an amenable number.

1275033749 is a deficient number, since it is larger than the sum of its proper divisors (174780631).

1275033749 is a wasteful number, since it uses less digits than its factorization.

1275033749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363412 (or 363401 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 1275033749 is about 35707.6147201126. The cubic root of 1275033749 is about 1084.3610100640.

The spelling of 1275033749 in words is "one billion, two hundred seventy-five million, thirty-three thousand, seven hundred forty-nine".