1361924257 has 2 divisors, whose sum is σ = 1361924258. Its totient is φ = 1361924256.

The previous prime is 1361924177. The next prime is 1361924287. The reversal of 1361924257 is 7524291631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891858496 + 470065761 = 29864^2 + 21681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361924257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361924287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680962128 + 680962129.

It is an arithmetic number, because the mean of its divisors is an integer number (680962129).

Almost surely, 2^1361924257 is an apocalyptic number.

It is an amenable number.

1361924257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361924257 is an equidigital number, since it uses as much as digits as its factorization.

1361924257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 1361924257 is about 36904.2579792630. The cubic root of 1361924257 is about 1108.4539406971.

The spelling of 1361924257 in words is "one billion, three hundred sixty-one million, nine hundred twenty-four thousand, two hundred fifty-seven".