2152690 has 16 divisors (see below), whose sum is σ = 3939480. Its totient is φ = 846720.

The previous prime is 2152679. The next prime is 2152691. The reversal of 2152690 is 962512.

It can be written as a sum of positive squares in 4 ways, for example, as 622521 + 1530169 = 789^2 + 1237^2 .

It is a super-2 number, since 2×2152690² = 9268148472200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2152691) 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, 1155 + ... + 2374.

2^2152690 is an apocalyptic number.

2152690 is a deficient number, since it is larger than the sum of its proper divisors (1786790).

2152690 is a wasteful number, since it uses less digits than its factorization.

2152690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2152690 is about 1467.2048255101. The cubic root of 2152690 is about 129.1200932797.

It can be divided in two parts, 215 and 2690, that multiplied together give a triangular number (578350 = T₁₀₇₅).

The spelling of 2152690 in words is "two million, one hundred fifty-two thousand, six hundred ninety".