1261654 has 4 divisors (see below), whose sum is σ = 1892484. Its totient is φ = 630826.

The previous prime is 1261649. The next prime is 1261697. The reversal of 1261654 is 4561621.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315412 + ... + 315415.

It is an arithmetic number, because the mean of its divisors is an integer number (473121).

2^1261654 is an apocalyptic number.

1261654 is a deficient number, since it is larger than the sum of its proper divisors (630830).

1261654 is an equidigital number, since it uses as much as digits as its factorization.

1261654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630829.

The product of its digits is 1440, while the sum is 25.

The square root of 1261654 is about 1123.2337245649. The cubic root of 1261654 is about 108.0554699048.

The spelling of 1261654 in words is "one million, two hundred sixty-one thousand, six hundred fifty-four".