1551941 has 4 divisors (see below), whose sum is σ = 1555500. Its totient is φ = 1548384.

The previous prime is 1551929. The next prime is 1551943. The reversal of 1551941 is 1491551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1491551 = 89 ⋅16759.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 863041 = 830^2 + 929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551941 is a prime.

It is a deceptive number, since it divides R_1551940.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1551941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551943) 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, 1016 + ... + 2033.

It is an arithmetic number, because the mean of its divisors is an integer number (388875).

2^1551941 is an apocalyptic number.

It is an amenable number.

1551941 is a deficient number, since it is larger than the sum of its proper divisors (3559).

1551941 is an equidigital number, since it uses as much as digits as its factorization.

1551941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558.

The product of its digits is 900, while the sum is 26.

The square root of 1551941 is about 1245.7692402688. The cubic root of 1551941 is about 115.7777402892. Note that the first 4 decimals are identical.

The spelling of 1551941 in words is "one million, five hundred fifty-one thousand, nine hundred forty-one".