1261506 has 16 divisors (see below), whose sum is σ = 2571264. Its totient is φ = 412464.

The previous prime is 1261489. The next prime is 1261523. The reversal of 1261506 is 6051621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1261489) and next prime (1261523).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1666 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (160704).

2^1261506 is an apocalyptic number.

1261506 is an abundant number, since it is smaller than the sum of its proper divisors (1309758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261506 is a wasteful number, since it uses less digits than its factorization.

1261506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1261506 is about 1123.1678414200. The cubic root of 1261506 is about 108.0512445428.

It can be divided in two parts, 126150 and 6, that multiplied together give a square (756900 = 870²).

The spelling of 1261506 in words is "one million, two hundred sixty-one thousand, five hundred six".