1121780629 has 8 divisors (see below), whose sum is σ = 1142406720. Its totient is φ = 1101208416.

The previous prime is 1121780609. The next prime is 1121780659. The reversal of 1121780629 is 9260871211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121780629 - 2¹³ = 1121772437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121780609) 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, 29817 + ... + 55969.

It is an arithmetic number, because the mean of its divisors is an integer number (142800840).

Almost surely, 2^1121780629 is an apocalyptic number.

It is an amenable number.

1121780629 is a deficient number, since it is larger than the sum of its proper divisors (20626091).

1121780629 is an equidigital number, since it uses as much as digits as its factorization.

1121780629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26939.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1121780629 is about 33492.9937300326. The cubic root of 1121780629 is about 1039.0488804919.

The spelling of 1121780629 in words is "one billion, one hundred twenty-one million, seven hundred eighty thousand, six hundred twenty-nine".