1242020504 has 8 divisors (see below), whose sum is σ = 2328788460. Its totient is φ = 621010248.

The previous prime is 1242020501. The next prime is 1242020513. The reversal of 1242020504 is 4050202421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1242020504² = 3085229864712828032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242020501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77626274 + ... + 77626289.

Almost surely, 2^1242020504 is an apocalyptic number.

It is an amenable number.

1242020504 is a deficient number, since it is larger than the sum of its proper divisors (1086767956).

1242020504 is a wasteful number, since it uses less digits than its factorization.

1242020504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155252569 (or 155252565 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1242020504 is about 35242.3112749434. The cubic root of 1242020504 is about 1074.9202764746.

Adding to 1242020504 its reverse (4050202421), we get a palindrome (5292222925).

The spelling of 1242020504 in words is "one billion, two hundred forty-two million, twenty thousand, five hundred four".