1425234581 has 4 divisors (see below), whose sum is σ = 1425350592. Its totient is φ = 1425118572.

The previous prime is 1425234563. The next prime is 1425234637. The reversal of 1425234581 is 1854325241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1425234581 is a prime.

It is a super-2 number, since 2×1425234581² = 4062587221756491122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425234511) 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, 37055 + ... + 64988.

It is an arithmetic number, because the mean of its divisors is an integer number (356337648).

Almost surely, 2^1425234581 is an apocalyptic number.

It is an amenable number.

1425234581 is a deficient number, since it is larger than the sum of its proper divisors (116011).

1425234581 is a wasteful number, since it uses less digits than its factorization.

1425234581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116010.

The product of its digits is 38400, while the sum is 35.

The square root of 1425234581 is about 37752.2791497414. The cubic root of 1425234581 is about 1125.3703027240.

The spelling of 1425234581 in words is "one billion, four hundred twenty-five million, two hundred thirty-four thousand, five hundred eighty-one".