1372732261 has 2 divisors, whose sum is σ = 1372732262. Its totient is φ = 1372732260.

The previous prime is 1372732259. The next prime is 1372732271. The reversal of 1372732261 is 1622372731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1296432036 + 76300225 = 36006^2 + 8735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372732261 - 2¹ = 1372732259 is a prime.

Together with 1372732259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372732271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686366130 + 686366131.

It is an arithmetic number, because the mean of its divisors is an integer number (686366131).

Almost surely, 2^1372732261 is an apocalyptic number.

It is an amenable number.

1372732261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372732261 is an equidigital number, since it uses as much as digits as its factorization.

1372732261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 1372732261 is about 37050.4016307516. The cubic root of 1372732261 is about 1111.3783869129.

The spelling of 1372732261 in words is "one billion, three hundred seventy-two million, seven hundred thirty-two thousand, two hundred sixty-one".