1254551142 has 64 divisors (see below), whose sum is σ = 2895782400. Its totient is φ = 358900224.

The previous prime is 1254551117. The next prime is 1254551143. The reversal of 1254551142 is 2411554521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254551143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104359 + ... + 115757.

It is an arithmetic number, because the mean of its divisors is an integer number (45246600).

Almost surely, 2^1254551142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1254551142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1447891200).

1254551142 is an abundant number, since it is smaller than the sum of its proper divisors (1641231258).

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

1254551142 is a wasteful number, since it uses less digits than its factorization.

1254551142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11517.

The product of its digits is 8000, while the sum is 30.

The square root of 1254551142 is about 35419.6434482336. The cubic root of 1254551142 is about 1078.5231133265.

The spelling of 1254551142 in words is "one billion, two hundred fifty-four million, five hundred fifty-one thousand, one hundred forty-two".