140630557 has 4 divisors (see below), whose sum is σ = 140666976. Its totient is φ = 140594140.

The previous prime is 140630551. The next prime is 140630569. The reversal of 140630557 is 755036041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140630557 - 2³ = 140630549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140630551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11623 + ... + 20404.

It is an arithmetic number, because the mean of its divisors is an integer number (35166744).

Almost surely, 2^140630557 is an apocalyptic number.

It is an amenable number.

140630557 is a deficient number, since it is larger than the sum of its proper divisors (36419).

140630557 is an equidigital number, since it uses as much as digits as its factorization.

140630557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36418.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 140630557 is about 11858.7755270095. The cubic root of 140630557 is about 520.0278054658.

Adding to 140630557 its reverse (755036041), we get a palindrome (895666598).

The spelling of 140630557 in words is "one hundred forty million, six hundred thirty thousand, five hundred fifty-seven".