1425381637 has 4 divisors (see below), whose sum is σ = 1428628960. Its totient is φ = 1422134316.

The previous prime is 1425381623. The next prime is 1425381641. The reversal of 1425381637 is 7361835241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7361835241 = 1999 ⋅3682759.

It is a cyclic number.

It is not a de Polignac number, because 1425381637 - 2⁷ = 1425381509 is a prime.

It is a super-2 number, since 2×1425381637² = 4063425622193599538, 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 1425381637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425381667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623003 + ... + 1623880.

It is an arithmetic number, because the mean of its divisors is an integer number (357157240).

Almost surely, 2^1425381637 is an apocalyptic number.

It is an amenable number.

1425381637 is a deficient number, since it is larger than the sum of its proper divisors (3247323).

1425381637 is an equidigital number, since it uses as much as digits as its factorization.

1425381637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247322.

The product of its digits is 120960, while the sum is 40.

The square root of 1425381637 is about 37754.2267435052. The cubic root of 1425381637 is about 1125.4090067067.

The spelling of 1425381637 in words is "one billion, four hundred twenty-five million, three hundred eighty-one thousand, six hundred thirty-seven".