1242065404 has 24 divisors (see below), whose sum is σ = 2212560000. Its totient is φ = 609925680.

The previous prime is 1242065401. The next prime is 1242065411. The reversal of 1242065404 is 4045602421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242065401) 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, 352009 + ... + 355519.

It is an arithmetic number, because the mean of its divisors is an integer number (92190000).

Almost surely, 2^1242065404 is an apocalyptic number.

It is an amenable number.

1242065404 is a deficient number, since it is larger than the sum of its proper divisors (970494596).

1242065404 is a wasteful number, since it uses less digits than its factorization.

1242065404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073 (or 5071 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1242065404 is about 35242.9482875653. The cubic root of 1242065404 is about 1074.9332293845.

Adding to 1242065404 its reverse (4045602421), we get a palindrome (5287667825).

It can be divided in two parts, 124 and 2065404, that added together give a triangular number (2065528 = T₂₀₃₂).

The spelling of 1242065404 in words is "one billion, two hundred forty-two million, sixty-five thousand, four hundred four".