1261554 has 32 divisors (see below), whose sum is σ = 2947200. Its totient is φ = 359856.

The previous prime is 1261549. The next prime is 1261567. The reversal of 1261554 is 4551621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1752 + ... + 2364.

It is an arithmetic number, because the mean of its divisors is an integer number (92100).

2^1261554 is an apocalyptic number.

1261554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473600).

1261554 is an abundant number, since it is smaller than the sum of its proper divisors (1685646).

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

1261554 is an equidigital number, since it uses as much as digits as its factorization.

1261554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 625 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 1261554 is about 1123.1892093499. The cubic root of 1261554 is about 108.0526149667.

The spelling of 1261554 in words is "one million, two hundred sixty-one thousand, five hundred fifty-four".