1242155004 has 24 divisors (see below), whose sum is σ = 2898943488. Its totient is φ = 413968560.

The previous prime is 1242154987. The next prime is 1242155021. The reversal of 1242155004 is 4005512421.

It is an interprime number because it is at equal distance from previous prime (1242154987) and next prime (1242155021).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93199 + ... + 105689.

It is an arithmetic number, because the mean of its divisors is an integer number (120789312).

Almost surely, 2^1242155004 is an apocalyptic number.

It is an amenable number.

1242155004 is an abundant number, since it is smaller than the sum of its proper divisors (1656788484).

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

1242155004 is a wasteful number, since it uses less digits than its factorization.

1242155004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20785 (or 20783 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1242155004 is about 35244.2194409239. The cubic root of 1242155004 is about 1074.9590765745.

Adding to 1242155004 its reverse (4005512421), we get a palindrome (5247667425).

The spelling of 1242155004 in words is "one billion, two hundred forty-two million, one hundred fifty-five thousand, four".