1253776538 has 8 divisors (see below), whose sum is σ = 2149331232. Its totient is φ = 537332796.

The previous prime is 1253776519. The next prime is 1253776543. The reversal of 1253776538 is 8356773521.

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

It is a junction number, because it is equal to n+sod(n) for n = 1253776492 and 1253776501.

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, 44777720 + ... + 44777747.

It is an arithmetic number, because the mean of its divisors is an integer number (268666404).

Almost surely, 2^1253776538 is an apocalyptic number.

1253776538 is a deficient number, since it is larger than the sum of its proper divisors (895554694).

1253776538 is an equidigital number, since it uses as much as digits as its factorization.

1253776538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89555476.

The product of its digits is 1058400, while the sum is 47.

The square root of 1253776538 is about 35408.7070930301. The cubic root of 1253776538 is about 1078.3010949249.

The spelling of 1253776538 in words is "one billion, two hundred fifty-three million, seven hundred seventy-six thousand, five hundred thirty-eight".