1252530100 has 18 divisors (see below), whose sum is σ = 2717990534. Its totient is φ = 501012000.

The previous prime is 1252530091. The next prime is 1252530109. The reversal of 1252530100 is 10352521.

It is an interprime number because it is at equal distance from previous prime (1252530091) and next prime (1252530109).

It can be written as a sum of positive squares in 3 ways, for example, as 68757264 + 1183772836 = 8292^2 + 34406^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252530109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6262551 + ... + 6262750.

Almost surely, 2^1252530100 is an apocalyptic number.

1252530100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252530100 is an abundant number, since it is smaller than the sum of its proper divisors (1465460434).

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

1252530100 is a wasteful number, since it uses less digits than its factorization.

1252530100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525315 (or 12525308 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1252530100 is about 35391.1019890593. The cubic root of 1252530100 is about 1077.9436465666.

Adding to 1252530100 its reverse (10352521), we get a palindrome (1262882621).

The spelling of 1252530100 in words is "one billion, two hundred fifty-two million, five hundred thirty thousand, one hundred".