1242871870 has 16 divisors (see below), whose sum is σ = 2368767888. Its totient is φ = 467904640.

The previous prime is 1242871867. The next prime is 1242871873. The reversal of 1242871870 is 781782421.

It is an interprime number because it is at equal distance from previous prime (1242871867) and next prime (1242871873).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242871873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3655336 + ... + 3655675.

It is an arithmetic number, because the mean of its divisors is an integer number (148047993).

Almost surely, 2^1242871870 is an apocalyptic number.

1242871870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242871870 is a deficient number, since it is larger than the sum of its proper divisors (1125896018).

1242871870 is a wasteful number, since it uses less digits than its factorization.

1242871870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311035.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 1242871870 is about 35254.3879538420. The cubic root of 1242871870 is about 1075.1658283933.

The spelling of 1242871870 in words is "one billion, two hundred forty-two million, eight hundred seventy-one thousand, eight hundred seventy".