125213453 has 4 divisors (see below), whose sum is σ = 125526108. Its totient is φ = 124900800.

The previous prime is 125213411. The next prime is 125213461. The reversal of 125213453 is 354312521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 354312521 = 17 ⋅20841913.

It can be written as a sum of positive squares in 2 ways, for example, as 70778569 + 54434884 = 8413^2 + 7378^2 .

It is a cyclic number.

It is not a de Polignac number, because 125213453 - 2¹⁶ = 125147917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125213353) 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, 155726 + ... + 156527.

It is an arithmetic number, because the mean of its divisors is an integer number (31381527).

Almost surely, 2^125213453 is an apocalyptic number.

It is an amenable number.

125213453 is a deficient number, since it is larger than the sum of its proper divisors (312655).

125213453 is an equidigital number, since it uses as much as digits as its factorization.

125213453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312654.

The product of its digits is 3600, while the sum is 26.

The square root of 125213453 is about 11189.8817241292. The cubic root of 125213453 is about 500.2844421546.

Adding to 125213453 its reverse (354312521), we get a palindrome (479525974).

The spelling of 125213453 in words is "one hundred twenty-five million, two hundred thirteen thousand, four hundred fifty-three".