1121604151 has 4 divisors (see below), whose sum is σ = 1121794912. Its totient is φ = 1121413392.

The previous prime is 1121604109. The next prime is 1121604157. The reversal of 1121604151 is 1514061211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121604151 - 2⁷ = 1121604023 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 (1121604157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86271 + ... + 98416.

It is an arithmetic number, because the mean of its divisors is an integer number (280448728).

Almost surely, 2^1121604151 is an apocalyptic number.

1121604151 is a deficient number, since it is larger than the sum of its proper divisors (190761).

1121604151 is an equidigital number, since it uses as much as digits as its factorization.

1121604151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190760.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1121604151 is about 33490.3590754115. The cubic root of 1121604151 is about 1038.9943900742.

Adding to 1121604151 its reverse (1514061211), we get a palindrome (2635665362).

The spelling of 1121604151 in words is "one billion, one hundred twenty-one million, six hundred four thousand, one hundred fifty-one".