140636465 has 8 divisors (see below), whose sum is σ = 170660520. Its totient is φ = 111244672.

The previous prime is 140636453. The next prime is 140636477. The reversal of 140636465 is 564636041.

It is an interprime number because it is at equal distance from previous prime (140636453) and next prime (140636477).

It can be written as a sum of positive squares in 4 ways, for example, as 7187761 + 133448704 = 2681^2 + 11552^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 140636465 - 2¹² = 140632369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157574 + ... + 158463.

It is an arithmetic number, because the mean of its divisors is an integer number (21332565).

Almost surely, 2^140636465 is an apocalyptic number.

It is an amenable number.

140636465 is a deficient number, since it is larger than the sum of its proper divisors (30024055).

140636465 is an equidigital number, since it uses as much as digits as its factorization.

140636465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316131.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 140636465 is about 11859.0246226239. The cubic root of 140636465 is about 520.0350876225.

The spelling of 140636465 in words is "one hundred forty million, six hundred thirty-six thousand, four hundred sixty-five".