1154405642 has 8 divisors (see below), whose sum is σ = 1864809156. Its totient is φ = 532802592.

The previous prime is 1154405641. The next prime is 1154405657. The reversal of 1154405642 is 2465044511.

It can be written as a sum of positive squares in 2 ways, for example, as 1134948721 + 19456921 = 33689^2 + 4411^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1154405599 and 1154405608.

It is not an unprimeable number, because it can be changed into a prime (1154405641) 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, 22200083 + ... + 22200134.

Almost surely, 2^1154405642 is an apocalyptic number.

1154405642 is a deficient number, since it is larger than the sum of its proper divisors (710403514).

1154405642 is a wasteful number, since it uses less digits than its factorization.

1154405642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44400232.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 1154405642 is about 33976.5454688966. The cubic root of 1154405642 is about 1049.0257454371.

The spelling of 1154405642 in words is "one billion, one hundred fifty-four million, four hundred five thousand, six hundred forty-two".