1000395261 has 12 divisors (see below), whose sum is σ = 1446969888. Its totient is φ = 666028104.

The previous prime is 1000395259. The next prime is 1000395269. The reversal of 1000395261 is 1625930001.

1000395261 is a `hidden beast` number, since 10 + 0 + 0 + 395 + 261 = 666.

It is not a de Polignac number, because 1000395261 - 2¹ = 1000395259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000395269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68115 + ... + 81488.

It is an arithmetic number, because the mean of its divisors is an integer number (120580824).

Almost surely, 2^1000395261 is an apocalyptic number.

It is an amenable number.

1000395261 is a deficient number, since it is larger than the sum of its proper divisors (446574627).

1000395261 is a wasteful number, since it uses less digits than its factorization.

1000395261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150352 (or 150349 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 1000395261 is about 31629.0256093987. The cubic root of 1000395261 is about 1000.1317363114.

Subtracting from 1000395261 its product of nonzero digits (1620), we obtain a square (1000393641 = 31629²).

The spelling of 1000395261 in words is "one billion, three hundred ninety-five thousand, two hundred sixty-one".