1242710181 has 20 divisors (see below), whose sum is σ = 1954101600. Its totient is φ = 784868616.

The previous prime is 1242710167. The next prime is 1242710197. The reversal of 1242710181 is 1810172421.

It is not a de Polignac number, because 1242710181 - 2¹⁷ = 1242579109 is a prime.

It is a super-2 number, since 2×1242710181² = 3088657187922105522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242710101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 402201 + ... + 405278.

It is an arithmetic number, because the mean of its divisors is an integer number (97705080).

Almost surely, 2^1242710181 is an apocalyptic number.

It is an amenable number.

1242710181 is a deficient number, since it is larger than the sum of its proper divisors (711391419).

1242710181 is an equidigital number, since it uses as much as digits as its factorization.

1242710181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807510 (or 807501 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1242710181 is about 35252.0947037194. The cubic root of 1242710181 is about 1075.1192025018.

The spelling of 1242710181 in words is "one billion, two hundred forty-two million, seven hundred ten thousand, one hundred eighty-one".