619261 has 2 divisors, whose sum is σ = 619262. Its totient is φ = 619260.

The previous prime is 619253. The next prime is 619273. The reversal of 619261 is 162916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 93636 = 725^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 619261 - 2³ = 619253 is a prime.

It is a super-2 number, since 2×619261² = 766968372242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (619061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309630 + 309631.

It is an arithmetic number, because the mean of its divisors is an integer number (309631).

2⁶¹⁹²⁶¹ is an apocalyptic number.

It is an amenable number.

619261 is a deficient number, since it is larger than the sum of its proper divisors (1).

619261 is an equidigital number, since it uses as much as digits as its factorization.

619261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 619261 is about 786.9313820150. The cubic root of 619261 is about 85.2362975084.

The spelling of 619261 in words is "six hundred nineteen thousand, two hundred sixty-one".