1253442065 has 32 divisors (see below), whose sum is σ = 1640140800. Its totient is φ = 916090560.

The previous prime is 1253442059. The next prime is 1253442067. The reversal of 1253442065 is 5602443521.

It is not a de Polignac number, because 1253442065 - 2¹⁰ = 1253441041 is a prime.

It is a super-2 number, since 2×1253442065² = 3142234020622928450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1253442067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1115594 + ... + 1116716.

It is an arithmetic number, because the mean of its divisors is an integer number (51254400).

Almost surely, 2^1253442065 is an apocalyptic number.

It is an amenable number.

1253442065 is a deficient number, since it is larger than the sum of its proper divisors (386698735).

1253442065 is a wasteful number, since it uses less digits than its factorization.

1253442065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1253442065 is about 35403.9837447709. The cubic root of 1253442065 is about 1078.2051993998.

Adding to 1253442065 its reverse (5602443521), we get a palindrome (6855885586).

The spelling of 1253442065 in words is "one billion, two hundred fifty-three million, four hundred forty-two thousand, sixty-five".