1255204540 has 12 divisors (see below), whose sum is σ = 2635929576. Its totient is φ = 502081808.

The previous prime is 1255204523. The next prime is 1255204547. The reversal of 1255204540 is 454025521.

It is a super-2 number, since 2×1255204540² = 3151076874473223200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1255204499 and 1255204508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255204547) 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, 31380094 + ... + 31380133.

It is an arithmetic number, because the mean of its divisors is an integer number (219660798).

Almost surely, 2^1255204540 is an apocalyptic number.

1255204540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255204540 is an abundant number, since it is smaller than the sum of its proper divisors (1380725036).

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

1255204540 is a wasteful number, since it uses less digits than its factorization.

1255204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62760236 (or 62760234 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 1255204540 is about 35428.8659146747. The cubic root of 1255204540 is about 1078.7103203987.

The spelling of 1255204540 in words is "one billion, two hundred fifty-five million, two hundred four thousand, five hundred forty".