1287215842190 has 16 divisors (see below), whose sum is σ = 2317335024240. Its totient is φ = 514809335040.

The previous prime is 1287215842151. The next prime is 1287215842229. The reversal of 1287215842190 is 912485127821.

It is an interprime number because it is at equal distance from previous prime (1287215842151) and next prime (1287215842229).

It is a super-2 number, since 2×1287215842190² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554996 + ... + 9688775.

It is an arithmetic number, because the mean of its divisors is an integer number (144833439015).

Almost surely, 2^{1287215842190} is an apocalyptic number.

1287215842190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287215842190 is a deficient number, since it is larger than the sum of its proper divisors (1030119182050).

1287215842190 is a wasteful number, since it uses less digits than its factorization.

1287215842190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19250467.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 1287215842190 in words is "one trillion, two hundred eighty-seven billion, two hundred fifteen million, eight hundred forty-two thousand, one hundred ninety".