1261722 has 32 divisors (see below), whose sum is σ = 3147264. Its totient is φ = 327600.

The previous prime is 1261721. The next prime is 1261739. The reversal of 1261722 is 2271621.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1261721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 904 + ... + 1827.

It is an arithmetic number, because the mean of its divisors is an integer number (98352).

2^1261722 is an apocalyptic number.

1261722 is an abundant number, since it is smaller than the sum of its proper divisors (1885542).

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

1261722 is a wasteful number, since it uses less digits than its factorization.

1261722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754.

The product of its digits is 336, while the sum is 21.

The square root of 1261722 is about 1123.2639939035. The cubic root of 1261722 is about 108.0574111766.

The spelling of 1261722 in words is "one million, two hundred sixty-one thousand, seven hundred twenty-two".