1295057281 has 4 divisors (see below), whose sum is σ = 1480065472. Its totient is φ = 1110049092.

The previous prime is 1295057243. The next prime is 1295057287. The reversal of 1295057281 is 1827505921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1827505921 = 809 ⋅2258969.

It is a cyclic number.

It is not a de Polignac number, because 1295057281 - 2⁹ = 1295056769 is a prime.

It is a super-2 number, since 2×1295057281² = 3354346722142225922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295057287) 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, 92504085 + ... + 92504098.

It is an arithmetic number, because the mean of its divisors is an integer number (370016368).

Almost surely, 2^1295057281 is an apocalyptic number.

It is an amenable number.

1295057281 is a deficient number, since it is larger than the sum of its proper divisors (185008191).

1295057281 is an equidigital number, since it uses as much as digits as its factorization.

1295057281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185008190.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1295057281 is about 35986.9042986473. The cubic root of 1295057281 is about 1090.0079344595.

The spelling of 1295057281 in words is "one billion, two hundred ninety-five million, fifty-seven thousand, two hundred eighty-one".