1251210132 has 48 divisors (see below), whose sum is σ = 3434699520. Its totient is φ = 392535936.

The previous prime is 1251210131. The next prime is 1251210157. The reversal of 1251210132 is 2310121521.

1251210132 is a `hidden beast` number, since 12 + 512 + 10 + 132 = 666.

1251210132 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251210131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338908 + ... + 342579.

It is an arithmetic number, because the mean of its divisors is an integer number (71556240).

Almost surely, 2^1251210132 is an apocalyptic number.

1251210132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251210132 is an abundant number, since it is smaller than the sum of its proper divisors (2183489388).

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

1251210132 is a wasteful number, since it uses less digits than its factorization.

1251210132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681517 (or 681509 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1251210132 is about 35372.4487701940. The cubic root of 1251210132 is about 1077.5648529466.

Adding to 1251210132 its reverse (2310121521), we get a palindrome (3561331653).

The spelling of 1251210132 in words is "one billion, two hundred fifty-one million, two hundred ten thousand, one hundred thirty-two".