1255444542 has 128 divisors (see below), whose sum is σ = 3137771520. Its totient is φ = 368824320.

The previous prime is 1255444523. The next prime is 1255444601. The reversal of 1255444542 is 2454445521.

1255444542 is a `hidden beast` number, since 1 + 25 + 54 + 44 + 542 = 666.

It is a super-2 number, since 2×1255444542² = 3152281996075179528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1255444497 and 1255444506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5388058 + ... + 5388290.

It is an arithmetic number, because the mean of its divisors is an integer number (24513840).

Almost surely, 2^1255444542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255444542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568885760).

1255444542 is an abundant number, since it is smaller than the sum of its proper divisors (1882326978).

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

1255444542 is a wasteful number, since it uses less digits than its factorization.

1255444542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 489 counting only the distinct ones).

The product of its digits is 128000, while the sum is 36.

The square root of 1255444542 is about 35432.2528496284. The cubic root of 1255444542 is about 1078.7790677959.

The spelling of 1255444542 in words is "one billion, two hundred fifty-five million, four hundred forty-four thousand, five hundred forty-two".