1425816 has 128 divisors (see below), whose sum is σ = 4838400. Its totient is φ = 380160.

The previous prime is 1425811. The next prime is 1425821. The reversal of 1425816 is 6185241.

It is an interprime number because it is at equal distance from previous prime (1425811) and next prime (1425821).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1425816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34756 + ... + 34796.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2^1425816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1425816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419200).

1425816 is an abundant number, since it is smaller than the sum of its proper divisors (3412584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1425816 is a wasteful number, since it uses less digits than its factorization.

1425816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 76 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1425816 is about 1194.0753745053. The cubic root of 1425816 is about 112.5523312091.

The spelling of 1425816 in words is "one million, four hundred twenty-five thousand, eight hundred sixteen".