1261550 has 24 divisors (see below), whose sum is σ = 2450736. Its totient is φ = 482240.

The previous prime is 1261549. The next prime is 1261567. The reversal of 1261550 is 551621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 602 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (102114).

2^1261550 is an apocalyptic number.

1261550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261550 is a deficient number, since it is larger than the sum of its proper divisors (1189186).

1261550 is a wasteful number, since it uses less digits than its factorization.

1261550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1261550 is about 1123.1874287046. The cubic root of 1261550 is about 108.0525007660.

The spelling of 1261550 in words is "one million, two hundred sixty-one thousand, five hundred fifty".