1255491602 has 4 divisors (see below), whose sum is σ = 1883237406. Its totient is φ = 627745800.

The previous prime is 1255491563. The next prime is 1255491619. The reversal of 1255491602 is 2061945521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2061945521 = 17 ⋅121290913.

It can be written as a sum of positive squares in only one way, i.e., 811167361 + 444324241 = 28481^2 + 21079^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313872899 + ... + 313872902.

Almost surely, 2^1255491602 is an apocalyptic number.

1255491602 is a deficient number, since it is larger than the sum of its proper divisors (627745804).

1255491602 is an equidigital number, since it uses as much as digits as its factorization.

1255491602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627745803.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1255491602 is about 35432.9169276254. The cubic root of 1255491602 is about 1078.7925468750.

The spelling of 1255491602 in words is "one billion, two hundred fifty-five million, four hundred ninety-one thousand, six hundred two".