1255140353521 has 8 divisors (see below), whose sum is σ = 1285319952224. Its totient is φ = 1225005768000.

The previous prime is 1255140353461. The next prime is 1255140353543. The reversal of 1255140353521 is 1253530415521.

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 1255140353521 - 2¹⁷ = 1255140222449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255140353581) 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, 11196855 + ... + 11308396.

It is an arithmetic number, because the mean of its divisors is an integer number (160664994028).

Almost surely, 2^{1255140353521} is an apocalyptic number.

It is an amenable number.

1255140353521 is a deficient number, since it is larger than the sum of its proper divisors (30179598703).

1255140353521 is a wasteful number, since it uses less digits than its factorization.

1255140353521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22506591.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 1255140353521 in words is "one trillion, two hundred fifty-five billion, one hundred forty million, three hundred fifty-three thousand, five hundred twenty-one".