136425257 has 4 divisors (see below), whose sum is σ = 136658256. Its totient is φ = 136192260.

The previous prime is 136425241. The next prime is 136425281. The reversal of 136425257 is 752524631.

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 136425257 - 2⁴ = 136425241 is a prime.

It is a super-2 number, since 2×136425257² = 37223701495032098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136425557) 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, 115619 + ... + 116792.

It is an arithmetic number, because the mean of its divisors is an integer number (34164564).

Almost surely, 2^136425257 is an apocalyptic number.

It is an amenable number.

136425257 is a deficient number, since it is larger than the sum of its proper divisors (232999).

136425257 is an equidigital number, since it uses as much as digits as its factorization.

136425257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232998.

The product of its digits is 50400, while the sum is 35.

The square root of 136425257 is about 11680.1223024419. The cubic root of 136425257 is about 514.7917680170.

Adding to 136425257 its reverse (752524631), we get a palindrome (888949888).

The spelling of 136425257 in words is "one hundred thirty-six million, four hundred twenty-five thousand, two hundred fifty-seven".