1242381031 has 2 divisors, whose sum is σ = 1242381032. Its totient is φ = 1242381030.

The previous prime is 1242380981. The next prime is 1242381043. The reversal of 1242381031 is 1301832421.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1301832421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242381031 - 2¹⁹ = 1241856743 is a prime.

It is a super-2 number, since 2×1242381031² = 3087021252377245922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242380987 and 1242381005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242381061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621190515 + 621190516.

It is an arithmetic number, because the mean of its divisors is an integer number (621190516).

Almost surely, 2^1242381031 is an apocalyptic number.

1242381031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242381031 is an equidigital number, since it uses as much as digits as its factorization.

1242381031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1242381031 is about 35247.4258776439. The cubic root of 1242381031 is about 1075.0242737623.

The spelling of 1242381031 in words is "one billion, two hundred forty-two million, three hundred eighty-one thousand, thirty-one".