1247489601 has 4 divisors (see below), whose sum is σ = 1663319472. Its totient is φ = 831659732.

The previous prime is 1247489591. The next prime is 1247489611. The reversal of 1247489601 is 1069847421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1247489591) and next prime (1247489611).

It is a cyclic number.

It is not a de Polignac number, because 1247489601 - 2²² = 1243295297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1247489611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207914931 + ... + 207914936.

It is an arithmetic number, because the mean of its divisors is an integer number (415829868).

Almost surely, 2^1247489601 is an apocalyptic number.

It is an amenable number.

1247489601 is a deficient number, since it is larger than the sum of its proper divisors (415829871).

1247489601 is an equidigital number, since it uses as much as digits as its factorization.

1247489601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415829870.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1247489601 is about 35319.8188132386. The cubic root of 1247489601 is about 1076.4957296299.

The spelling of 1247489601 in words is "one billion, two hundred forty-seven million, four hundred eighty-nine thousand, six hundred one".