1425262644 has 144 divisors (see below), whose sum is σ = 4062541392. Its totient is φ = 418369536.

The previous prime is 1425262583. The next prime is 1425262661. The reversal of 1425262644 is 4462625241.

1425262644 is a `hidden beast` number, since 1 + 4 + 2 + 5 + 2 + 6 + 2 + 644 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9998244 + 1415264400 = 3162^2 + 37620^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1425262599 and 1425262608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 916972 + ... + 918524.

It is an arithmetic number, because the mean of its divisors is an integer number (28212093).

Almost surely, 2^1425262644 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 1425262644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031270696).

1425262644 is an abundant number, since it is smaller than the sum of its proper divisors (2637278748).

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

1425262644 is a wasteful number, since it uses less digits than its factorization.

1425262644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1661 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 1425262644 is about 37752.6508208364. The cubic root of 1425262644 is about 1125.3776888905.

Adding to 1425262644 its reverse (4462625241), we get a palindrome (5887887885).

The spelling of 1425262644 in words is "one billion, four hundred twenty-five million, two hundred sixty-two thousand, six hundred forty-four".