2151396 has 36 divisors (see below), whose sum is σ = 5857852. Its totient is φ = 661824.

The previous prime is 2151377. The next prime is 2151403. The reversal of 2151396 is 6931512.

It can be written as a sum of positive squares in 2 ways, for example, as 230400 + 1920996 = 480^2 + 1386^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1831 + ... + 2766.

2^2151396 is an apocalyptic number.

2151396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2151396 is an abundant number, since it is smaller than the sum of its proper divisors (3706456).

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

2151396 is a wasteful number, since it uses less digits than its factorization.

2151396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620 (or 4615 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 2151396 is about 1466.7637846634. The cubic root of 2151396 is about 129.0942163706.

It can be divided in two parts, 21513 and 96, that added together give a square (21609 = 147²).

The spelling of 2151396 in words is "two million, one hundred fifty-one thousand, three hundred ninety-six".