1295057279 has 4 divisors (see below), whose sum is σ = 1319492376. Its totient is φ = 1270622184.

The previous prime is 1295057243. The next prime is 1295057287. The reversal of 1295057279 is 9727505921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1295057279 - 2¹⁶ = 1294991743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1295057299) 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, 12217469 + ... + 12217574.

It is an arithmetic number, because the mean of its divisors is an integer number (329873094).

Almost surely, 2^1295057279 is an apocalyptic number.

1295057279 is a deficient number, since it is larger than the sum of its proper divisors (24435097).

1295057279 is an equidigital number, since it uses as much as digits as its factorization.

1295057279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24435096.

The product of its (nonzero) digits is 396900, while the sum is 47.

The square root of 1295057279 is about 35986.9042708594. The cubic root of 1295057279 is about 1090.0079338984.

The spelling of 1295057279 in words is "one billion, two hundred ninety-five million, fifty-seven thousand, two hundred seventy-nine".