1672006261 has 2 divisors, whose sum is σ = 1672006262. Its totient is φ = 1672006260.

The previous prime is 1672006201. The next prime is 1672006267. The reversal of 1672006261 is 1626002761.

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., 1671992100 + 14161 = 40890^2 + 119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1672006261 - 2²⁹ = 1135135349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672006267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836003130 + 836003131.

It is an arithmetic number, because the mean of its divisors is an integer number (836003131).

Almost surely, 2^1672006261 is an apocalyptic number.

It is an amenable number.

1672006261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672006261 is an equidigital number, since it uses as much as digits as its factorization.

1672006261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1672006261 is about 40890.1731593301. The cubic root of 1672006261 is about 1186.8959095666.

The spelling of 1672006261 in words is "one billion, six hundred seventy-two million, six thousand, two hundred sixty-one".