142611997 has 32 divisors (see below), whose sum is σ = 172882944. Its totient is φ = 116121600.

The previous prime is 142611977. The next prime is 142612007. The reversal of 142611997 is 799116241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142611997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142611977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423013 + ... + 423349.

It is an arithmetic number, because the mean of its divisors is an integer number (5402592).

Almost surely, 2^142611997 is an apocalyptic number.

142611997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

142611997 is a deficient number, since it is larger than the sum of its proper divisors (30270947).

142611997 is a wasteful number, since it uses less digits than its factorization.

142611997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its digits is 27216, while the sum is 40.

The square root of 142611997 is about 11942.0265030689. The cubic root of 142611997 is about 522.4587661576.

The spelling of 142611997 in words is "one hundred forty-two million, six hundred eleven thousand, nine hundred ninety-seven".