140775021 has 6 divisors (see below), whose sum is σ = 203341710. Its totient is φ = 93850008.

The previous prime is 140775013. The next prime is 140775023. The reversal of 140775021 is 120577041.

It can be written as a sum of positive squares in only one way, i.e., 135978921 + 4796100 = 11661^2 + 2190^2 .

It is not a de Polignac number, because 140775021 - 2³ = 140775013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140775023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7820826 + ... + 7820843.

It is an arithmetic number, because the mean of its divisors is an integer number (33890285).

Almost surely, 2^140775021 is an apocalyptic number.

It is an amenable number.

140775021 is a deficient number, since it is larger than the sum of its proper divisors (62566689).

140775021 is a wasteful number, since it uses less digits than its factorization.

140775021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15641675 (or 15641672 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 140775021 is about 11864.8649802684. The cubic root of 140775021 is about 520.2058122679.

The spelling of 140775021 in words is "one hundred forty million, seven hundred seventy-five thousand, twenty-one".