1261332454 has 4 divisors (see below), whose sum is σ = 1891998684. Its totient is φ = 630666226.

The previous prime is 1261332451. The next prime is 1261332481. The reversal of 1261332454 is 4542331621.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×1261332454³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261332451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315333112 + ... + 315333115.

It is an arithmetic number, because the mean of its divisors is an integer number (472999671).

Almost surely, 2^1261332454 is an apocalyptic number.

1261332454 is a deficient number, since it is larger than the sum of its proper divisors (630666230).

1261332454 is an equidigital number, since it uses as much as digits as its factorization.

1261332454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630666229.

The product of its digits is 17280, while the sum is 31.

The square root of 1261332454 is about 35515.2425586536. The cubic root of 1261332454 is about 1080.4628942794.

The spelling of 1261332454 in words is "one billion, two hundred sixty-one million, three hundred thirty-two thousand, four hundred fifty-four".