1251340412 has 24 divisors (see below), whose sum is σ = 2504683104. Its totient is φ = 535859712.

The previous prime is 1251340393. The next prime is 1251340421. The reversal of 1251340412 is 2140431521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19088 + ... + 53544.

It is an arithmetic number, because the mean of its divisors is an integer number (104361796).

Almost surely, 2^1251340412 is an apocalyptic number.

It is an amenable number.

1251340412 is an abundant number, since it is smaller than the sum of its proper divisors (1253342692).

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

1251340412 is a wasteful number, since it uses less digits than its factorization.

1251340412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35765 (or 35763 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1251340412 is about 35374.2902684987. The cubic root of 1251340412 is about 1077.6022514814.

Adding to 1251340412 its reverse (2140431521), we get a palindrome (3391771933).

It can be divided in two parts, 12513 and 40412, that added together give a palindrome (52925).

The spelling of 1251340412 in words is "one billion, two hundred fifty-one million, three hundred forty thousand, four hundred twelve".