142081649 has 16 divisors (see below), whose sum is σ = 154635264. Its totient is φ = 130152000.

The previous prime is 142081637. The next prime is 142081657. The reversal of 142081649 is 946180241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142081649 - 2⁴ = 142081633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142081349) 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, 71027 + ... + 72999.

It is an arithmetic number, because the mean of its divisors is an integer number (9664704).

Almost surely, 2^142081649 is an apocalyptic number.

It is an amenable number.

142081649 is a deficient number, since it is larger than the sum of its proper divisors (12553615).

142081649 is a wasteful number, since it uses less digits than its factorization.

142081649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 142081649 is about 11919.8007114213. The cubic root of 142081649 is about 521.8103187266.

The spelling of 142081649 in words is "one hundred forty-two million, eighty-one thousand, six hundred forty-nine".