125783491 has 2 divisors, whose sum is σ = 125783492. Its totient is φ = 125783490.

The previous prime is 125783423. The next prime is 125783501. The reversal of 125783491 is 194387521.

It is a strong prime.

It is an emirp because it is prime and its reverse (194387521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125783491 - 2¹¹ = 125781443 is a prime.

It is not a weakly prime, because it can be changed into another prime (125783191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62891745 + 62891746.

It is an arithmetic number, because the mean of its divisors is an integer number (62891746).

Almost surely, 2^125783491 is an apocalyptic number.

125783491 is a deficient number, since it is larger than the sum of its proper divisors (1).

125783491 is an equidigital number, since it uses as much as digits as its factorization.

125783491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 125783491 is about 11215.3239364719. The cubic root of 125783491 is about 501.0424796285.

It can be divided in two parts, 1257 and 83491, that added together give a palindrome (84748).

The spelling of 125783491 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, four hundred ninety-one".