140660402 has 4 divisors (see below), whose sum is σ = 210990606. Its totient is φ = 70330200.

The previous prime is 140660393. The next prime is 140660413. The reversal of 140660402 is 204066041.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 82428241 + 58232161 = 9079^2 + 7631^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35165099 + ... + 35165102.

Almost surely, 2^140660402 is an apocalyptic number.

140660402 is a deficient number, since it is larger than the sum of its proper divisors (70330204).

140660402 is an equidigital number, since it uses as much as digits as its factorization.

140660402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70330203.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140660402 is about 11860.0338110817. The cubic root of 140660402 is about 520.0645901031.

The spelling of 140660402 in words is "one hundred forty million, six hundred sixty thousand, four hundred two".