261151325 has 12 divisors (see below), whose sum is σ = 325622388. Its totient is φ = 207763200.

The previous prime is 261151313. The next prime is 261151337. The reversal of 261151325 is 523151162.

It is an interprime number because it is at equal distance from previous prime (261151313) and next prime (261151337).

It can be written as a sum of positive squares in 6 ways, for example, as 78198649 + 182952676 = 8843^2 + 13526^2 .

It is not a de Polignac number, because 261151325 - 2¹⁴ = 261134941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 261151294 and 261151303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24332 + ... + 33381.

It is an arithmetic number, because the mean of its divisors is an integer number (27135199).

Almost surely, 2^261151325 is an apocalyptic number.

261151325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

261151325 is a deficient number, since it is larger than the sum of its proper divisors (64471063).

261151325 is a wasteful number, since it uses less digits than its factorization.

261151325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57904 (or 57899 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 261151325 is about 16160.1771339302. The cubic root of 261151325 is about 639.1911371678.

The spelling of 261151325 in words is "two hundred sixty-one million, one hundred fifty-one thousand, three hundred twenty-five".