140777221 has 8 divisors (see below), whose sum is σ = 160524504. Its totient is φ = 122304000.

The previous prime is 140777209. The next prime is 140777237. The reversal of 140777221 is 122777041.

It can be written as a sum of positive squares in 4 ways, for example, as 16900321 + 123876900 = 4111^2 + 11130^2 .

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

It is not a de Polignac number, because 140777221 - 2⁷ = 140777093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140777291) 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, 318280 + ... + 318721.

It is an arithmetic number, because the mean of its divisors is an integer number (20065563).

Almost surely, 2^140777221 is an apocalyptic number.

It is an amenable number.

140777221 is a deficient number, since it is larger than the sum of its proper divisors (19747283).

140777221 is a wasteful number, since it uses less digits than its factorization.

140777221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637031.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 140777221 is about 11864.9576906115. The cubic root of 140777221 is about 520.2085221398.

The spelling of 140777221 in words is "one hundred forty million, seven hundred seventy-seven thousand, two hundred twenty-one".