1247136061 has 8 divisors (see below), whose sum is σ = 1307047680. Its totient is φ = 1187698512.

The previous prime is 1247136043. The next prime is 1247136083. The reversal of 1247136061 is 1606317421.

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

It is a cyclic number.

It is not a de Polignac number, because 1247136061 - 2²¹ = 1245038909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247136361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113125 + ... + 123658.

It is an arithmetic number, because the mean of its divisors is an integer number (163380960).

Almost surely, 2^1247136061 is an apocalyptic number.

It is an amenable number.

1247136061 is a deficient number, since it is larger than the sum of its proper divisors (59911619).

1247136061 is a wasteful number, since it uses less digits than its factorization.

1247136061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237035.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1247136061 is about 35314.8136197828. The cubic root of 1247136061 is about 1076.3940266422.

The spelling of 1247136061 in words is "one billion, two hundred forty-seven million, one hundred thirty-six thousand, sixty-one".