60142391 has 4 divisors (see below), whose sum is σ = 63307800. Its totient is φ = 56976984.

The previous prime is 60142339. The next prime is 60142393. The reversal of 60142391 is 19324106.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60142391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 60142391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60142393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1582676 + ... + 1582713.

It is an arithmetic number, because the mean of its divisors is an integer number (15826950).

Almost surely, 2^60142391 is an apocalyptic number.

60142391 is a deficient number, since it is larger than the sum of its proper divisors (3165409).

60142391 is a wasteful number, since it uses less digits than its factorization.

60142391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165408.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 60142391 is about 7755.1525452437. The cubic root of 60142391 is about 391.7962094103.

Adding to 60142391 its reverse (19324106), we get a palindrome (79466497).

The spelling of 60142391 in words is "sixty million, one hundred forty-two thousand, three hundred ninety-one".