136431145 has 4 divisors (see below), whose sum is σ = 163717380. Its totient is φ = 109144912.

The previous prime is 136431133. The next prime is 136431157. The reversal of 136431145 is 541134631.

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

It is an interprime number because it is at equal distance from previous prime (136431133) and next prime (136431157).

It can be written as a sum of positive squares in 2 ways, for example, as 100861849 + 35569296 = 10043^2 + 5964^2 .

It is a cyclic number.

It is not a de Polignac number, because 136431145 - 2⁹ = 136430633 is a prime.

It is a super-2 number, since 2×136431145² = 37226914652022050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13643110 + ... + 13643119.

It is an arithmetic number, because the mean of its divisors is an integer number (40929345).

Almost surely, 2^136431145 is an apocalyptic number.

It is an amenable number.

136431145 is a deficient number, since it is larger than the sum of its proper divisors (27286235).

136431145 is an equidigital number, since it uses as much as digits as its factorization.

136431145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27286234.

The product of its digits is 4320, while the sum is 28.

The square root of 136431145 is about 11680.3743518776. The cubic root of 136431145 is about 514.7991739046.

Adding to 136431145 its reverse (541134631), we get a palindrome (677565776).

The spelling of 136431145 in words is "one hundred thirty-six million, four hundred thirty-one thousand, one hundred forty-five".