1425609 has 24 divisors (see below), whose sum is σ = 2201472. Its totient is φ = 887040.

The previous prime is 1425607. The next prime is 1425629. The reversal of 1425609 is 9065241.

It is not a de Polignac number, because 1425609 - 2¹ = 1425607 is a prime.

It is a super-2 number, since 2×1425609² = 4064722041762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1425601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14649 + ... + 14745.

It is an arithmetic number, because the mean of its divisors is an integer number (91728).

2^1425609 is an apocalyptic number.

It is an amenable number.

1425609 is a deficient number, since it is larger than the sum of its proper divisors (775863).

1425609 is a wasteful number, since it uses less digits than its factorization.

1425609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1425609 is about 1193.9886934138. The cubic root of 1425609 is about 112.5468841621.

Adding to 1425609 its sum of digits (27), we get a square (1425636 = 1194²).

The spelling of 1425609 in words is "one million, four hundred twenty-five thousand, six hundred nine".