1129720046 has 36 divisors (see below), whose sum is σ = 2100135816. Its totient is φ = 446275440.

The previous prime is 1129720043. The next prime is 1129720051. The reversal of 1129720046 is 6400279211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1129719994 and 1129720021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129720043) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1634561 + ... + 1635251.

It is an arithmetic number, because the mean of its divisors is an integer number (58337106).

Almost surely, 2^1129720046 is an apocalyptic number.

1129720046 is a deficient number, since it is larger than the sum of its proper divisors (970415770).

1129720046 is an frugal number, since it uses more digits than its factorization.

1129720046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1129720046 is about 33611.3083053903. The cubic root of 1129720046 is about 1041.4944140931.

Adding to 1129720046 its reverse (6400279211), we get a palindrome (7529999257).

The spelling of 1129720046 in words is "one billion, one hundred twenty-nine million, seven hundred twenty thousand, forty-six".