142491761 has 8 divisors (see below), whose sum is σ = 148152000. Its totient is φ = 136881360.

The previous prime is 142491749. The next prime is 142491799. The reversal of 142491761 is 167194241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142491761 - 2²² = 138297457 is a prime.

It is a super-3 number, since 3×142491761³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142491361) 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, 6575 + ... + 18116.

It is an arithmetic number, because the mean of its divisors is an integer number (18519000).

Almost surely, 2^142491761 is an apocalyptic number.

It is an amenable number.

142491761 is a deficient number, since it is larger than the sum of its proper divisors (5660239).

142491761 is a wasteful number, since it uses less digits than its factorization.

142491761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24919.

The product of its digits is 12096, while the sum is 35.

The square root of 142491761 is about 11936.9912875900. The cubic root of 142491761 is about 522.3118967595.

The spelling of 142491761 in words is "one hundred forty-two million, four hundred ninety-one thousand, seven hundred sixty-one".