25194761 has 2 divisors, whose sum is σ = 25194762. Its totient is φ = 25194760.

The previous prime is 25194721. The next prime is 25194797. The reversal of 25194761 is 16749152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24810361 + 384400 = 4981^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25194761 is a prime.

It is not a weakly prime, because it can be changed into another prime (25194721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597380 + 12597381.

It is an arithmetic number, because the mean of its divisors is an integer number (12597381).

Almost surely, 2^25194761 is an apocalyptic number.

It is an amenable number.

25194761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25194761 is an equidigital number, since it uses as much as digits as its factorization.

25194761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 25194761 is about 5019.4383151903. The cubic root of 25194761 is about 293.1591233425.

The spelling of 25194761 in words is "twenty-five million, one hundred ninety-four thousand, seven hundred sixty-one".