1255678258 has 8 divisors (see below), whose sum is σ = 1902166380. Its totient is φ = 621622800.

The previous prime is 1255678243. The next prime is 1255678267. The reversal of 1255678258 is 8528765521.

It can be written as a sum of positive squares in 2 ways, for example, as 814132089 + 441546169 = 28533^2 + 21013^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1255678258² = 3153455775227829128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3107913 + ... + 3108316.

Almost surely, 2^1255678258 is an apocalyptic number.

1255678258 is a deficient number, since it is larger than the sum of its proper divisors (646488122).

1255678258 is a wasteful number, since it uses less digits than its factorization.

1255678258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216332.

The product of its digits is 1344000, while the sum is 49.

The square root of 1255678258 is about 35435.5507647334. The cubic root of 1255678258 is about 1078.8460061795.

The spelling of 1255678258 in words is "one billion, two hundred fifty-five million, six hundred seventy-eight thousand, two hundred fifty-eight".