1261395 has 12 divisors (see below), whose sum is σ = 2186496. Its totient is φ = 672720.

The previous prime is 1261387. The next prime is 1261411. The reversal of 1261395 is 5931621.

It is not a de Polignac number, because 1261395 - 2³ = 1261387 is a prime.

It is a super-2 number, since 2×1261395² = 3182234692050, which contains 22 as substring.

1261395 is a lucky number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 13971 + ... + 14060.

It is an arithmetic number, because the mean of its divisors is an integer number (182208).

2^1261395 is an apocalyptic number.

1261395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1261395 is a deficient number, since it is larger than the sum of its proper divisors (925101).

1261395 is a wasteful number, since it uses less digits than its factorization.

1261395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28042 (or 28039 counting only the distinct ones).

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

The square root of 1261395 is about 1123.1184265250. The cubic root of 1261395 is about 108.0480753043.

It can be divided in two parts, 126 and 1395, that added together give a square (1521 = 39²).

The spelling of 1261395 in words is "one million, two hundred sixty-one thousand, three hundred ninety-five".