1204721126 has 16 divisors (see below), whose sum is σ = 2065699584. Its totient is φ = 516193224.

The previous prime is 1204721123. The next prime is 1204721129. The reversal of 1204721126 is 6211274021.

It is an interprime number because it is at equal distance from previous prime (1204721123) and next prime (1204721129).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1204721095 and 1204721104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204721123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91601 + ... + 103923.

It is an arithmetic number, because the mean of its divisors is an integer number (129106224).

Almost surely, 2^1204721126 is an apocalyptic number.

1204721126 is a deficient number, since it is larger than the sum of its proper divisors (860978458).

1204721126 is a wasteful number, since it uses less digits than its factorization.

1204721126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19315.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1204721126 is about 34709.0928432306. The cubic root of 1204721126 is about 1064.0503414052.

Adding to 1204721126 its reverse (6211274021), we get a palindrome (7415995147).

The spelling of 1204721126 in words is "one billion, two hundred four million, seven hundred twenty-one thousand, one hundred twenty-six".