1271540212 has 6 divisors (see below), whose sum is σ = 2225195378. Its totient is φ = 635770104.

The previous prime is 1271540201. The next prime is 1271540213. The reversal of 1271540212 is 2120451721.

It can be written as a sum of positive squares in only one way, i.e., 685706596 + 585833616 = 26186^2 + 24204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271540213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158942523 + ... + 158942530.

Almost surely, 2^1271540212 is an apocalyptic number.

It is an amenable number.

1271540212 is a deficient number, since it is larger than the sum of its proper divisors (953655166).

1271540212 is a wasteful number, since it uses less digits than its factorization.

1271540212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317885057 (or 317885055 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1271540212 is about 35658.6625099708. The cubic root of 1271540212 is about 1083.3697368333.

Adding to 1271540212 its reverse (2120451721), we get a palindrome (3391991933).

The spelling of 1271540212 in words is "one billion, two hundred seventy-one million, five hundred forty thousand, two hundred twelve".