1247508061 has 16 divisors (see below), whose sum is σ = 1324051200. Its totient is φ = 1175358240.

The previous prime is 1247508047. The next prime is 1247508071. The reversal of 1247508061 is 1608057421.

It is not a de Polignac number, because 1247508061 - 2⁵ = 1247508029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247508071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638921 + ... + 1639681.

It is an arithmetic number, because the mean of its divisors is an integer number (82753200).

Almost surely, 2^1247508061 is an apocalyptic number.

It is an amenable number.

1247508061 is a deficient number, since it is larger than the sum of its proper divisors (76543139).

1247508061 is an frugal number, since it uses more digits than its factorization.

1247508061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1247508061 is about 35320.0801386407. The cubic root of 1247508061 is about 1076.5010394973.

The spelling of 1247508061 in words is "one billion, two hundred forty-seven million, five hundred eight thousand, sixty-one".