2091554 has 8 divisors (see below), whose sum is σ = 3157788. Its totient is φ = 1038960.

The previous prime is 2091553. The next prime is 2091581. The reversal of 2091554 is 4551902.

It can be written as a sum of positive squares in 2 ways, for example, as 2036329 + 55225 = 1427^2 + 235^2 .

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 (2091553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3017 + ... + 3644.

2^2091554 is an apocalyptic number.

2091554 is a deficient number, since it is larger than the sum of its proper divisors (1066234).

2091554 is a wasteful number, since it uses less digits than its factorization.

2091554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2091554 is about 1446.2205917494. The cubic root of 2091554 is about 127.8860069096.

The spelling of 2091554 in words is "two million, ninety-one thousand, five hundred fifty-four".