1400521 has 4 divisors (see below), whose sum is σ = 1411344. Its totient is φ = 1389700.

The previous prime is 1400507. The next prime is 1400527. The reversal of 1400521 is 1250041.

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: 1250041 = 13 ⋅96157.

It is a cyclic number.

It is not a de Polignac number, because 1400521 - 2⁵ = 1400489 is a prime.

It is a super-2 number, since 2×1400521² = 3922918142882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1400527) 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, 5215 + ... + 5476.

It is an arithmetic number, because the mean of its divisors is an integer number (352836).

2^1400521 is an apocalyptic number.

It is an amenable number.

1400521 is a deficient number, since it is larger than the sum of its proper divisors (10823).

1400521 is a wasteful number, since it uses less digits than its factorization.

1400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10822.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1400521 is about 1183.4360988241. The cubic root of 1400521 is about 111.8827695571.

Adding to 1400521 its reverse (1250041), we get a palindrome (2650562).

The spelling of 1400521 in words is "one million, four hundred thousand, five hundred twenty-one".