1292521 has 8 divisors (see below), whose sum is σ = 1341704. Its totient is φ = 1244160.

The previous prime is 1292509. The next prime is 1292539. The reversal of 1292521 is 1252921.

It can be written as a sum of positive squares in 4 ways, for example, as 26896 + 1265625 = 164^2 + 1125^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(1292521) divides (1292521-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 1292521 - 2⁹ = 1292009 is a prime.

It is a super-2 number, since 2×1292521² = 3341221070882, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1292492 and 1292501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1292591) 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, 6601 + ... + 6793.

It is an arithmetic number, because the mean of its divisors is an integer number (167713).

2^1292521 is an apocalyptic number.

It is an amenable number.

1292521 is a deficient number, since it is larger than the sum of its proper divisors (49183).

1292521 is a wasteful number, since it uses less digits than its factorization.

1292521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411.

The product of its digits is 360, while the sum is 22.

The square root of 1292521 is about 1136.8909358421. The cubic root of 1292521 is about 108.9295900802.

The spelling of 1292521 in words is "one million, two hundred ninety-two thousand, five hundred twenty-one".