991214142 has 16 divisors (see below), whose sum is σ = 2050788240. Its totient is φ = 319011392.

The previous prime is 991214123. The next prime is 991214153. The reversal of 991214142 is 241412199.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2848143 + ... + 2848490.

It is an arithmetic number, because the mean of its divisors is an integer number (128174265).

Almost surely, 2^991214142 is an apocalyptic number.

991214142 is an abundant number, since it is smaller than the sum of its proper divisors (1059574098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991214142 is a wasteful number, since it uses less digits than its factorization.

991214142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696667.

The product of its digits is 5184, while the sum is 33.

The square root of 991214142 is about 31483.5535160820. The cubic root of 991214142 is about 997.0627617450.

The spelling of 991214142 in words is "nine hundred ninety-one million, two hundred fourteen thousand, one hundred forty-two".