1240142210 has 8 divisors (see below), whose sum is σ = 2232255996. Its totient is φ = 496056880.

The previous prime is 1240142207. The next prime is 1240142213. The reversal of 1240142210 is 122410421.

It is an interprime number because it is at equal distance from previous prime (1240142207) and next prime (1240142213).

It can be written as a sum of positive squares in 2 ways, for example, as 1203187969 + 36954241 = 34687^2 + 6079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1240142213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62007101 + ... + 62007120.

Almost surely, 2^1240142210 is an apocalyptic number.

1240142210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1240142210 is a deficient number, since it is larger than the sum of its proper divisors (992113786).

1240142210 is a wasteful number, since it uses less digits than its factorization.

1240142210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124014228.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1240142210 is about 35215.6529117380. The cubic root of 1240142210 is about 1074.3781397080.

Adding to 1240142210 its reverse (122410421), we get a palindrome (1362552631).

The spelling of 1240142210 in words is "one billion, two hundred forty million, one hundred forty-two thousand, two hundred ten".