1191321070 has 64 divisors (see below), whose sum is σ = 2330467200. Its totient is φ = 436817920.

The previous prime is 1191321023. The next prime is 1191321101. The reversal of 1191321070 is 701231911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1073676 + ... + 1074784.

It is an arithmetic number, because the mean of its divisors is an integer number (36413550).

Almost surely, 2^1191321070 is an apocalyptic number.

1191321070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1191321070 is a deficient number, since it is larger than the sum of its proper divisors (1139146130).

1191321070 is a wasteful number, since it uses less digits than its factorization.

1191321070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 1191321070 is about 34515.5192630793. The cubic root of 1191321070 is about 1060.0904960118.

Adding to 1191321070 its reverse (701231911), we get a palindrome (1892552981).

The spelling of 1191321070 in words is "one billion, one hundred ninety-one million, three hundred twenty-one thousand, seventy".