1247274487 has 2 divisors, whose sum is σ = 1247274488. Its totient is φ = 1247274486.

The previous prime is 1247274481. The next prime is 1247274517. The reversal of 1247274487 is 7844727421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1247274487 - 2⁷ = 1247274359 is a prime.

It is a super-2 number, since 2×1247274487² = 3111387291842226338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247274481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623637243 + 623637244.

It is an arithmetic number, because the mean of its divisors is an integer number (623637244).

Almost surely, 2^1247274487 is an apocalyptic number.

1247274487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247274487 is an equidigital number, since it uses as much as digits as its factorization.

1247274487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 702464, while the sum is 46.

The square root of 1247274487 is about 35316.7734511521. The cubic root of 1247274487 is about 1076.4338499921.

The spelling of 1247274487 in words is "one billion, two hundred forty-seven million, two hundred seventy-four thousand, four hundred eighty-seven".