1961654 has 4 divisors (see below), whose sum is σ = 2942484. Its totient is φ = 980826.

The previous prime is 1961653. The next prime is 1961657. The reversal of 1961654 is 4561691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4561691 = 19 ⋅240089.

It is a d-powerful number, because it can be written as 1 + 9³ + 6 + 1 + 6⁵ + 5⁹ + 4² .

It is a self number, because there is not a number n which added to its sum of digits gives 1961654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490412 + ... + 490415.

It is an arithmetic number, because the mean of its divisors is an integer number (735621).

2^1961654 is an apocalyptic number.

1961654 is a deficient number, since it is larger than the sum of its proper divisors (980830).

1961654 is an equidigital number, since it uses as much as digits as its factorization.

1961654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980829.

The product of its digits is 6480, while the sum is 32.

The square root of 1961654 is about 1400.5905897156. The cubic root of 1961654 is about 125.1816877884.

The spelling of 1961654 in words is "one million, nine hundred sixty-one thousand, six hundred fifty-four".