1425442637 has 4 divisors (see below), whose sum is σ = 1435697760. Its totient is φ = 1415187516.

The previous prime is 1425442633. The next prime is 1425442657. The reversal of 1425442637 is 7362445241.

It is a happy number.

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 not a de Polignac number, because 1425442637 - 2² = 1425442633 is a prime.

It is a super-2 number, since 2×1425442637² = 4063773422755027538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1425442637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425442631) 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, 5127353 + ... + 5127630.

It is an arithmetic number, because the mean of its divisors is an integer number (358924440).

Almost surely, 2^1425442637 is an apocalyptic number.

It is an amenable number.

1425442637 is a deficient number, since it is larger than the sum of its proper divisors (10255123).

1425442637 is a wasteful number, since it uses less digits than its factorization.

1425442637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10255122.

The product of its digits is 161280, while the sum is 38.

The square root of 1425442637 is about 37755.0345914290. The cubic root of 1425442637 is about 1125.4250606459.

Adding to 1425442637 its reverse (7362445241), we get a palindrome (8787887878).

The spelling of 1425442637 in words is "one billion, four hundred twenty-five million, four hundred forty-two thousand, six hundred thirty-seven".