1295242091 has 32 divisors (see below), whose sum is σ = 1571102400. Its totient is φ = 1051937280.

The previous prime is 1295242063. The next prime is 1295242153. The reversal of 1295242091 is 1902425921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1295242091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295241091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1211105 + ... + 1212173.

It is an arithmetic number, because the mean of its divisors is an integer number (49096950).

Almost surely, 2^1295242091 is an apocalyptic number.

1295242091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1295242091 is a deficient number, since it is larger than the sum of its proper divisors (275860309).

1295242091 is a wasteful number, since it uses less digits than its factorization.

1295242091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1295242091 is about 35989.4719466680. The cubic root of 1295242091 is about 1090.0597815317.

The spelling of 1295242091 in words is "one billion, two hundred ninety-five million, two hundred forty-two thousand, ninety-one".