1242644441 has 16 divisors (see below), whose sum is σ = 1345713600. Its totient is φ = 1143590400.

The previous prime is 1242644423. The next prime is 1242644449. The reversal of 1242644441 is 1444462421.

It is a cyclic number.

It is not a de Polignac number, because 1242644441 - 2²² = 1238450137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242644398 and 1242644407.

It is not an unprimeable number, because it can be changed into a prime (1242644449) 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, 184430 + ... + 191048.

It is an arithmetic number, because the mean of its divisors is an integer number (84107100).

Almost surely, 2^1242644441 is an apocalyptic number.

It is an amenable number.

1242644441 is a deficient number, since it is larger than the sum of its proper divisors (103069159).

1242644441 is a wasteful number, since it uses less digits than its factorization.

1242644441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6920.

The product of its digits is 24576, while the sum is 32.

The square root of 1242644441 is about 35251.1622645268. The cubic root of 1242644441 is about 1075.1002440502.

The spelling of 1242644441 in words is "one billion, two hundred forty-two million, six hundred forty-four thousand, four hundred forty-one".