1612641 has 4 divisors (see below), whose sum is σ = 2150192. Its totient is φ = 1075092.

The previous prime is 1612621. The next prime is 1612649. The reversal of 1612641 is 1462161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1462161 = 3 ⋅487387.

It is not a de Polignac number, because 1612641 - 2⁵ = 1612609 is a prime.

It is a super-2 number, since 2×1612641² = 5201221989762, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1612641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1612649) 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, 268771 + ... + 268776.

It is an arithmetic number, because the mean of its divisors is an integer number (537548).

2^1612641 is an apocalyptic number.

It is an amenable number.

1612641 is a deficient number, since it is larger than the sum of its proper divisors (537551).

1612641 is an equidigital number, since it uses as much as digits as its factorization.

1612641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537550.

The product of its digits is 288, while the sum is 21.

The square root of 1612641 is about 1269.8980274022. The cubic root of 1612641 is about 117.2679227864.

It can be divided in two parts, 16126 and 41, that multiplied together give a palindrome (661166).

The spelling of 1612641 in words is "one million, six hundred twelve thousand, six hundred forty-one".