1242125313 has 32 divisors (see below), whose sum is σ = 1949173632. Its totient is φ = 693657600.

The previous prime is 1242125309. The next prime is 1242125317. The reversal of 1242125313 is 3135212421.

It is an interprime number because it is at equal distance from previous prime (1242125309) and next prime (1242125317).

It is not a de Polignac number, because 1242125313 - 2² = 1242125309 is a prime.

It is a super-3 number, since 3×1242125313³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242125317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272731 + ... + 277247.

It is an arithmetic number, because the mean of its divisors is an integer number (60911676).

Almost surely, 2^1242125313 is an apocalyptic number.

1242125313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1242125313 is a deficient number, since it is larger than the sum of its proper divisors (707048319).

1242125313 is a wasteful number, since it uses less digits than its factorization.

1242125313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185.

The product of its digits is 1440, while the sum is 24.

The square root of 1242125313 is about 35243.7982203962. The cubic root of 1242125313 is about 1074.9505116573.

Adding to 1242125313 its reverse (3135212421), we get a palindrome (4377337734).

The spelling of 1242125313 in words is "one billion, two hundred forty-two million, one hundred twenty-five thousand, three hundred thirteen".