142207457 has 16 divisors (see below), whose sum is σ = 174576000. Its totient is φ = 115471440.

The previous prime is 142207453. The next prime is 142207463. The reversal of 142207457 is 754702241.

It is not a de Polignac number, because 142207457 - 2² = 142207453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142207453) 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, 4394 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (10911000).

Almost surely, 2^142207457 is an apocalyptic number.

It is an amenable number.

142207457 is a deficient number, since it is larger than the sum of its proper divisors (32368543).

142207457 is an equidigital number, since it uses as much as digits as its factorization.

142207457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21861 (or 21847 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 142207457 is about 11925.0768131698. The cubic root of 142207457 is about 521.9642878149.

Adding to 142207457 its reverse (754702241), we get a palindrome (896909698).

The spelling of 142207457 in words is "one hundred forty-two million, two hundred seven thousand, four hundred fifty-seven".