1742521 has 6 divisors (see below), whose sum is σ = 1915466. Its totient is φ = 1584000.

The previous prime is 1742513. The next prime is 1742527. The reversal of 1742521 is 1252471.

1742521 = T₁₉₆ + T₁₉₇ + ... + T₂₆₁.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 121 = 1320^2 + 11^2 .

It is not a de Polignac number, because 1742521 - 2³ = 1742513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1742492 and 1742501.

It is not an unprimeable number, because it can be changed into a prime (1742527) by changing a digit.

It is a nontrivial repunit in base 120.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7080 + ... + 7321.

2^1742521 is an apocalyptic number.

1742521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1742521 is a deficient number, since it is larger than the sum of its proper divisors (172945).

1742521 is a wasteful number, since it uses less digits than its factorization.

1742521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14423 (or 14412 counting only the distinct ones).

The product of its digits is 560, while the sum is 22.

The square root of 1742521 is about 1320.0458325376. The cubic root of 1742521 is about 120.3351970784.

Adding to 1742521 its reverse (1252471), we get a palindrome (2994992).

The spelling of 1742521 in words is "one million, seven hundred forty-two thousand, five hundred twenty-one".