1421521263 has 6 divisors (see below), whose sum is σ = 2053308504. Its totient is φ = 947680836.

The previous prime is 1421521243. The next prime is 1421521267. The reversal of 1421521263 is 3621251241.

It is not a de Polignac number, because 1421521263 - 2²⁰ = 1420472687 is a prime.

It is a super-2 number, since 2×1421521263² = 4041445402322230338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421521267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78973395 + ... + 78973412.

It is an arithmetic number, because the mean of its divisors is an integer number (342218084).

Almost surely, 2^1421521263 is an apocalyptic number.

1421521263 is a deficient number, since it is larger than the sum of its proper divisors (631787241).

1421521263 is a wasteful number, since it uses less digits than its factorization.

1421521263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157946813 (or 157946810 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1421521263 is about 37703.0670237847. The cubic root of 1421521263 is about 1124.3921029877.

The spelling of 1421521263 in words is "one billion, four hundred twenty-one million, five hundred twenty-one thousand, two hundred sixty-three".