1154421551 has 8 divisors (see below), whose sum is σ = 1215494400. Its totient is φ = 1093380120.

The previous prime is 1154421547. The next prime is 1154421607. The reversal of 1154421551 is 1551244511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1154421551 - 2² = 1154421547 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 (1154421511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127856 + ... + 136586.

It is an arithmetic number, because the mean of its divisors is an integer number (151936800).

Almost surely, 2^1154421551 is an apocalyptic number.

1154421551 is a deficient number, since it is larger than the sum of its proper divisors (61072849).

1154421551 is an equidigital number, since it uses as much as digits as its factorization.

1154421551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15709.

The product of its digits is 4000, while the sum is 29.

The square root of 1154421551 is about 33976.7795854757. The cubic root of 1154421551 is about 1049.0305643307.

The spelling of 1154421551 in words is "one billion, one hundred fifty-four million, four hundred twenty-one thousand, five hundred fifty-one".