1255404557 has 8 divisors (see below), whose sum is σ = 1382098080. Its totient is φ = 1130805360.

The previous prime is 1255404533. The next prime is 1255404581. The reversal of 1255404557 is 7554045521.

It is an interprime number because it is at equal distance from previous prime (1255404533) and next prime (1255404581).

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 1255404557 - 2¹⁶ = 1255339021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255404557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255404517) 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, 522323 + ... + 524720.

It is an arithmetic number, because the mean of its divisors is an integer number (172762260).

Almost surely, 2^1255404557 is an apocalyptic number.

It is an amenable number.

1255404557 is a deficient number, since it is larger than the sum of its proper divisors (126693523).

1255404557 is a wasteful number, since it uses less digits than its factorization.

1255404557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047163.

The product of its (nonzero) digits is 140000, while the sum is 38.

The square root of 1255404557 is about 35431.6885993315. The cubic root of 1255404557 is about 1078.7676148968.

The spelling of 1255404557 in words is "one billion, two hundred fifty-five million, four hundred four thousand, five hundred fifty-seven".