1242646461 has 64 divisors (see below), whose sum is σ = 2209075200. Its totient is φ = 674993088.

The previous prime is 1242646451. The next prime is 1242646463. The reversal of 1242646461 is 1646462421.

1242646461 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 6 + 4 + 646 + 1 = 666.

It is not a de Polignac number, because 1242646461 - 2⁵ = 1242646429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242646463) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 777315 + ... + 778911.

It is an arithmetic number, because the mean of its divisors is an integer number (34516800).

Almost surely, 2^1242646461 is an apocalyptic number.

It is an amenable number.

1242646461 is a deficient number, since it is larger than the sum of its proper divisors (966428739).

1242646461 is a wasteful number, since it uses less digits than its factorization.

1242646461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1809 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 1242646461 is about 35251.1909160528. The cubic root of 1242646461 is about 1075.1008265985.

The spelling of 1242646461 in words is "one billion, two hundred forty-two million, six hundred forty-six thousand, four hundred sixty-one".