1242142210 has 32 divisors (see below), whose sum is σ = 2325043440. Its totient is φ = 477216768.

The previous prime is 1242142189. The next prime is 1242142211. The reversal of 1242142210 is 122412421.

It can be written as a sum of positive squares in 8 ways, for example, as 725171041 + 516971169 = 26929^2 + 22737^2 .

It is not an unprimeable number, because it can be changed into a prime (1242142211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44874 + ... + 67066.

Almost surely, 2^1242142210 is an apocalyptic number.

1242142210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242142210 is a deficient number, since it is larger than the sum of its proper divisors (1082901230).

1242142210 is a wasteful number, since it uses less digits than its factorization.

1242142210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22422.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1242142210 is about 35244.0379355147. The cubic root of 1242142210 is about 1074.9553859257.

Adding to 1242142210 its reverse (122412421), we get a palindrome (1364554631).

The spelling of 1242142210 in words is "one billion, two hundred forty-two million, one hundred forty-two thousand, two hundred ten".