125005126394 has 4 divisors (see below), whose sum is σ = 187507689594. Its totient is φ = 62502563196.

The previous prime is 125005126357. The next prime is 125005126399. The reversal of 125005126394 is 493621500521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493621500521 = 1489 ⋅331512089.

It can be written as a sum of positive squares in only one way, i.e., 115637403025 + 9367723369 = 340055^2 + 96787^2 .

It is not an unprimeable number, because it can be changed into a prime (125005126399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31251281597 + ... + 31251281600.

Almost surely, 2^125005126394 is an apocalyptic number.

125005126394 is a deficient number, since it is larger than the sum of its proper divisors (62502563200).

125005126394 is an equidigital number, since it uses as much as digits as its factorization.

125005126394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62502563199.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 125005126394 in words is "one hundred twenty-five billion, five million, one hundred twenty-six thousand, three hundred ninety-four".