1425169909 has 4 divisors (see below), whose sum is σ = 1425460000. Its totient is φ = 1424879820.

The previous prime is 1425169871. The next prime is 1425169937. The reversal of 1425169909 is 9099615241.

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 a de Polignac number, because none of the positive numbers 2^k-1425169909 is a prime.

It is a super-2 number, since 2×1425169909² = 4062218539038136562, 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 (1425169979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137547 + ... + 147544.

It is an arithmetic number, because the mean of its divisors is an integer number (356365000).

Almost surely, 2^1425169909 is an apocalyptic number.

It is an amenable number.

1425169909 is a deficient number, since it is larger than the sum of its proper divisors (290091).

1425169909 is an equidigital number, since it uses as much as digits as its factorization.

1425169909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290090.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 1425169909 is about 37751.4226089561. The cubic root of 1425169909 is about 1125.3532807194.

The spelling of 1425169909 in words is "one billion, four hundred twenty-five million, one hundred sixty-nine thousand, nine hundred nine".