1121640375 has 16 divisors (see below), whose sum is σ = 1866410208. Its totient is φ = 598208000.

The previous prime is 1121640353. The next prime is 1121640407. The reversal of 1121640375 is 5730461211.

It is not a de Polignac number, because 1121640375 - 2⁵ = 1121640343 is a prime.

It is a super-3 number, since 3×1121640375³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1495146 + ... + 1495895.

It is an arithmetic number, because the mean of its divisors is an integer number (116650638).

Almost surely, 2^1121640375 is an apocalyptic number.

1121640375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121640375 is a deficient number, since it is larger than the sum of its proper divisors (744769833).

1121640375 is an equidigital number, since it uses as much as digits as its factorization.

1121640375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991059 (or 2991049 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1121640375 is about 33490.8998834012. The cubic root of 1121640375 is about 1039.0055752823.

The spelling of 1121640375 in words is "one billion, one hundred twenty-one million, six hundred forty thousand, three hundred seventy-five".