1295042739 has 16 divisors (see below), whose sum is σ = 1770206592. Its totient is φ = 841696128.

The previous prime is 1295042729. The next prime is 1295042741. The reversal of 1295042739 is 9372405921.

It is not a de Polignac number, because 1295042739 - 2¹⁵ = 1295009971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1295042739.

It is not an unprimeable number, because it can be changed into a prime (1295042719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61387 + ... + 79739.

It is an arithmetic number, because the mean of its divisors is an integer number (110637912).

Almost surely, 2^1295042739 is an apocalyptic number.

1295042739 is a deficient number, since it is larger than the sum of its proper divisors (475163853).

1295042739 is a wasteful number, since it uses less digits than its factorization.

1295042739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18946.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1295042739 is about 35986.7022523598. The cubic root of 1295042739 is about 1090.0038546002.

The spelling of 1295042739 in words is "one billion, two hundred ninety-five million, forty-two thousand, seven hundred thirty-nine".