1521151 has 4 divisors (see below), whose sum is σ = 1587312. Its totient is φ = 1454992.

The previous prime is 1521133. The next prime is 1521193. The reversal of 1521151 is 1511251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1511251 = 7 ⋅215893.

It is a cyclic number.

It is not a de Polignac number, because 1521151 - 2⁵ = 1521119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561151) 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, 33046 + ... + 33091.

It is an arithmetic number, because the mean of its divisors is an integer number (396828).

2^1521151 is an apocalyptic number.

1521151 is a deficient number, since it is larger than the sum of its proper divisors (66161).

1521151 is an equidigital number, since it uses as much as digits as its factorization.

1521151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66160.

The product of its digits is 50, while the sum is 16.

The square root of 1521151 is about 1233.3495043985. The cubic root of 1521151 is about 115.0069561010.

The spelling of 1521151 in words is "one million, five hundred twenty-one thousand, one hundred fifty-one".