1154354985 has 72 divisors (see below), whose sum is σ = 2343646656. Its totient is φ = 524059200.

The previous prime is 1154354969. The next prime is 1154354987. The reversal of 1154354985 is 5894534511.

It is a happy number.

1154354985 is a `hidden beast` number, since 1 + 154 + 3 + 5 + 498 + 5 = 666.

It is not a de Polignac number, because 1154354985 - 2⁴ = 1154354969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1154354985.

It is not an unprimeable number, because it can be changed into a prime (1154354987) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 331222 + ... + 334688.

It is an arithmetic number, because the mean of its divisors is an integer number (32550648).

Almost surely, 2^1154354985 is an apocalyptic number.

1154354985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1154354985 is an abundant number, since it is smaller than the sum of its proper divisors (1189291671).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1154354985 is a wasteful number, since it uses less digits than its factorization.

1154354985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3643 (or 3633 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The square root of 1154354985 is about 33975.7999905815. The cubic root of 1154354985 is about 1049.0104009537.

The spelling of 1154354985 in words is "one billion, one hundred fifty-four million, three hundred fifty-four thousand, nine hundred eighty-five".