1242520004 has 24 divisors (see below), whose sum is σ = 2511619488. Its totient is φ = 531559040.

The previous prime is 1242520001. The next prime is 1242520009. The reversal of 1242520004 is 4000252421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1242520001) 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, 829814 + ... + 831309.

It is an arithmetic number, because the mean of its divisors is an integer number (104650812).

Almost surely, 2^1242520004 is an apocalyptic number.

It is an amenable number.

1242520004 is an abundant number, since it is smaller than the sum of its proper divisors (1269099484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242520004 is a wasteful number, since it uses less digits than its factorization.

1242520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661155 (or 1661153 counting only the distinct ones).

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

The square root of 1242520004 is about 35249.3972147043. The cubic root of 1242520004 is about 1075.0643564139.

Adding to 1242520004 its reverse (4000252421), we get a palindrome (5242772425).

The spelling of 1242520004 in words is "one billion, two hundred forty-two million, five hundred twenty thousand, four".