1154997147 has 16 divisors (see below), whose sum is σ = 1572721920. Its totient is φ = 753703392.

The previous prime is 1154997133. The next prime is 1154997149. The reversal of 1154997147 is 7417994511.

It is a happy number.

It is not a de Polignac number, because 1154997147 - 2⁶ = 1154997083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1154997096 and 1154997105.

It is not an unprimeable number, because it can be changed into a prime (1154997149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61528 + ... + 78074.

It is an arithmetic number, because the mean of its divisors is an integer number (98295120).

Almost surely, 2^1154997147 is an apocalyptic number.

1154997147 is a deficient number, since it is larger than the sum of its proper divisors (417724773).

1154997147 is a wasteful number, since it uses less digits than its factorization.

1154997147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17042.

The product of its digits is 317520, while the sum is 48.

The square root of 1154997147 is about 33985.2489618658. The cubic root of 1154997147 is about 1049.2048846701.

The spelling of 1154997147 in words is "one billion, one hundred fifty-four million, nine hundred ninety-seven thousand, one hundred forty-seven".