140264581 has 4 divisors (see below), whose sum is σ = 143526592. Its totient is φ = 137002572.

The previous prime is 140264533. The next prime is 140264611. The reversal of 140264581 is 185462041.

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 140264581 - 2¹⁷ = 140133509 is a prime.

It is a super-2 number, since 2×140264581² = 39348305366211122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140264381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630941 + ... + 1631026.

It is an arithmetic number, because the mean of its divisors is an integer number (35881648).

Almost surely, 2^140264581 is an apocalyptic number.

It is an amenable number.

140264581 is a deficient number, since it is larger than the sum of its proper divisors (3262011).

140264581 is an equidigital number, since it uses as much as digits as its factorization.

140264581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3262010.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 140264581 is about 11843.3348766300. The cubic root of 140264581 is about 519.5763079793.

The spelling of 140264581 in words is "one hundred forty million, two hundred sixty-four thousand, five hundred eighty-one".