1961554 has 8 divisors (see below), whose sum is σ = 3362688. Its totient is φ = 840660.

The previous prime is 1961551. The next prime is 1961581. The reversal of 1961554 is 4551691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1961551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70042 + ... + 70069.

It is an arithmetic number, because the mean of its divisors is an integer number (420336).

2^1961554 is an apocalyptic number.

1961554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1961554 is a deficient number, since it is larger than the sum of its proper divisors (1401134).

1961554 is a wasteful number, since it uses less digits than its factorization.

1961554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140120.

The product of its digits is 5400, while the sum is 31.

The square root of 1961554 is about 1400.5548900347. The cubic root of 1961554 is about 125.1795606071.

The spelling of 1961554 in words is "one million, nine hundred sixty-one thousand, five hundred fifty-four".