261024019 has 2 divisors, whose sum is σ = 261024020. Its totient is φ = 261024018.

The previous prime is 261024013. The next prime is 261024077. The reversal of 261024019 is 910420162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261024019 - 2⁷ = 261023891 is a prime.

It is a super-2 number, since 2×261024019² = 136267076989824722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 261023984 and 261024002.

It is not a weakly prime, because it can be changed into another prime (261024013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130512009 + 130512010.

It is an arithmetic number, because the mean of its divisors is an integer number (130512010).

Almost surely, 2^261024019 is an apocalyptic number.

261024019 is a deficient number, since it is larger than the sum of its proper divisors (1).

261024019 is an equidigital number, since it uses as much as digits as its factorization.

261024019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 261024019 is about 16156.2377736898. The cubic root of 261024019 is about 639.0872560265.

The spelling of 261024019 in words is "two hundred sixty-one million, twenty-four thousand, nineteen".