125722405 has 4 divisors (see below), whose sum is σ = 150866892. Its totient is φ = 100577920.

The previous prime is 125722369. The next prime is 125722427. The reversal of 125722405 is 504227521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63011844 + 62710561 = 7938^2 + 7919^2 .

It is not a de Polignac number, because 125722405 - 2¹³ = 125714213 is a prime.

It is a super-2 number, since 2×125722405² = 31612246237968050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 12572236 + ... + 12572245.

It is an arithmetic number, because the mean of its divisors is an integer number (37716723).

Almost surely, 2^125722405 is an apocalyptic number.

It is an amenable number.

125722405 is a deficient number, since it is larger than the sum of its proper divisors (25144487).

125722405 is an equidigital number, since it uses as much as digits as its factorization.

125722405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25144486.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 125722405 is about 11212.6002782584. The cubic root of 125722405 is about 500.9613570672.

Adding to 125722405 its reverse (504227521), we get a palindrome (629949926).

The spelling of 125722405 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, four hundred five".