2151654 has 16 divisors (see below), whose sum is σ = 4348848. Its totient is φ = 709632.

The previous prime is 2151647. The next prime is 2151659. The reversal of 2151654 is 4561512.

It is a super-2 number, since 2×2151654² = 9259229871432, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1267 + ... + 2430.

It is an arithmetic number, because the mean of its divisors is an integer number (271803).

2^2151654 is an apocalyptic number.

2151654 is an abundant number, since it is smaller than the sum of its proper divisors (2197194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151654 is a wasteful number, since it uses less digits than its factorization.

2151654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799.

The product of its digits is 1200, while the sum is 24.

The square root of 2151654 is about 1466.8517307485. The cubic root of 2151654 is about 129.0993765824.

The spelling of 2151654 in words is "two million, one hundred fifty-one thousand, six hundred fifty-four".