1425028209 has 16 divisors (see below), whose sum is σ = 2073863424. Its totient is φ = 863197200.

The previous prime is 1425028207. The next prime is 1425028211. The reversal of 1425028209 is 9028205241.

It is an interprime number because it is at equal distance from previous prime (1425028207) and next prime (1425028211).

It is not a de Polignac number, because 1425028209 - 2¹ = 1425028207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 1425028209.

It is not an unprimeable number, because it can be changed into a prime (1425028207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58374 + ... + 79104.

It is an arithmetic number, because the mean of its divisors is an integer number (129616464).

Almost surely, 2^1425028209 is an apocalyptic number.

It is an amenable number.

1425028209 is a deficient number, since it is larger than the sum of its proper divisors (648835215).

1425028209 is a wasteful number, since it uses less digits than its factorization.

1425028209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22828.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 1425028209 is about 37749.5458118373. The cubic root of 1425028209 is about 1125.3159827467.

The spelling of 1425028209 in words is "one billion, four hundred twenty-five million, twenty-eight thousand, two hundred nine".