1425531220 has 24 divisors (see below), whose sum is σ = 2994753384. Its totient is φ = 569995776.

The previous prime is 1425531199. The next prime is 1425531257. The reversal of 1425531220 is 221355241.

It can be written as a sum of positive squares in 4 ways, for example, as 450967696 + 974563524 = 21236^2 + 31218^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46992 + ... + 71128.

It is an arithmetic number, because the mean of its divisors is an integer number (124781391).

Almost surely, 2^1425531220 is an apocalyptic number.

1425531220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1425531220 is an abundant number, since it is smaller than the sum of its proper divisors (1569222164).

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

1425531220 is a wasteful number, since it uses less digits than its factorization.

1425531220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27099 (or 27097 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1425531220 is about 37756.2077015158. The cubic root of 1425531220 is about 1125.4483730450.

Adding to 1425531220 its reverse (221355241), we get a palindrome (1646886461).

The spelling of 1425531220 in words is "one billion, four hundred twenty-five million, five hundred thirty-one thousand, two hundred twenty".