1261214356 has 12 divisors (see below), whose sum is σ = 2254085568. Its totient is φ = 617189912.

The previous prime is 1261214347. The next prime is 1261214359. The reversal of 1261214356 is 6534121621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261214359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3354106 + ... + 3354481.

It is an arithmetic number, because the mean of its divisors is an integer number (187840464).

Almost surely, 2^1261214356 is an apocalyptic number.

It is an amenable number.

1261214356 is a deficient number, since it is larger than the sum of its proper divisors (992871212).

1261214356 is a wasteful number, since it uses less digits than its factorization.

1261214356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6708638 (or 6708636 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 1261214356 is about 35513.5798815045. The cubic root of 1261214356 is about 1080.4291721392.

Adding to 1261214356 its reverse (6534121621), we get a palindrome (7795335977).

The spelling of 1261214356 in words is "one billion, two hundred sixty-one million, two hundred fourteen thousand, three hundred fifty-six".