774452421 has 14 divisors (see below), whose sum is σ = 1161148550. Its totient is φ = 516301128.

The previous prime is 774452353. The next prime is 774452443. The reversal of 774452421 is 124254477.

774452421 is a `hidden beast` number, since 77 + 44 + 524 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 364389921 = 20250^2 + 19089^2 .

It is a de Polignac number, because none of the positive numbers 2^k-774452421 is a prime.

It is a super-2 number, since 2×774452421² = 1199553104785522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774452461) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 530446 + ... + 531903.

Almost surely, 2^774452421 is an apocalyptic number.

It is an amenable number.

774452421 is a deficient number, since it is larger than the sum of its proper divisors (386696129).

774452421 is an equidigital number, since it uses as much as digits as its factorization.

774452421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062367 (or 1062352 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 774452421 is about 27828.9852671634. The cubic root of 774452421 is about 918.3288902288.

The spelling of 774452421 in words is "seven hundred seventy-four million, four hundred fifty-two thousand, four hundred twenty-one".