1212307641 has 10 divisors (see below), whose sum is σ = 1810978202. Its totient is φ = 808205040.

The previous prime is 1212307589. The next prime is 1212307651. The reversal of 1212307641 is 1467032121.

1212307641 is a `hidden beast` number, since 1 + 2 + 12 + 3 + 0 + 7 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 615238416 + 597069225 = 24804^2 + 24435^2 .

It is not a de Polignac number, because 1212307641 - 2⁷ = 1212307513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212307651) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7483300 + ... + 7483461.

Almost surely, 2^1212307641 is an apocalyptic number.

It is an amenable number.

1212307641 is a deficient number, since it is larger than the sum of its proper divisors (598670561).

1212307641 is an equidigital number, since it uses as much as digits as its factorization.

1212307641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14966773 (or 14966764 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1212307641 is about 34818.2084691329. The cubic root of 1212307641 is about 1066.2792245980.

Adding to 1212307641 its reverse (1467032121), we get a palindrome (2679339762).

The spelling of 1212307641 in words is "one billion, two hundred twelve million, three hundred seven thousand, six hundred forty-one".