1253422739 has 4 divisors (see below), whose sum is σ = 1253932056. Its totient is φ = 1252913424.

The previous prime is 1253422691. The next prime is 1253422741. The reversal of 1253422739 is 9372243521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9372243521 = 7759 ⋅1207919.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253422739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253422139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250949 + ... + 255894.

It is an arithmetic number, because the mean of its divisors is an integer number (313483014).

Almost surely, 2^1253422739 is an apocalyptic number.

1253422739 is a deficient number, since it is larger than the sum of its proper divisors (509317).

1253422739 is an equidigital number, since it uses as much as digits as its factorization.

1253422739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509316.

The product of its digits is 90720, while the sum is 38.

The square root of 1253422739 is about 35403.7108083319. The cubic root of 1253422739 is about 1078.1996579920.

The spelling of 1253422739 in words is "one billion, two hundred fifty-three million, four hundred twenty-two thousand, seven hundred thirty-nine".