1252132020 has 60 divisors (see below), whose sum is σ = 3927989604. Its totient is φ = 333901440.

The previous prime is 1252132003. The next prime is 1252132027. The reversal of 1252132020 is 202312521.

It can be written as a sum of positive squares in 2 ways, for example, as 387066276 + 865065744 = 19674^2 + 29412^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1252131984 and 1252132002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252132027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 384841 + ... + 388080.

Almost surely, 2^1252132020 is an apocalyptic number.

1252132020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252132020 is an abundant number, since it is smaller than the sum of its proper divisors (2675857584).

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

1252132020 is a wasteful number, since it uses less digits than its factorization.

1252132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772942 (or 772931 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1252132020 is about 35385.4775296307. The cubic root of 1252132020 is about 1077.8294368629.

Adding to 1252132020 its reverse (202312521), we get a palindrome (1454444541).

The spelling of 1252132020 in words is "one billion, two hundred fifty-two million, one hundred thirty-two thousand, twenty".