1621141264 has 20 divisors (see below), whose sum is σ = 3141592204. Its totient is φ = 810407808.

The previous prime is 1621141243. The next prime is 1621141283. The reversal of 1621141264 is 4621411261.

It can be written as a sum of positive squares in 2 ways, for example, as 929030400 + 692110864 = 30480^2 + 26308^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132994 + ... + 144670.

Almost surely, 2^1621141264 is an apocalyptic number.

It is an amenable number.

1621141264 is a deficient number, since it is larger than the sum of its proper divisors (1520450940).

1621141264 is a wasteful number, since it uses less digits than its factorization.

1621141264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20362 (or 20356 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1621141264 is about 40263.3985649498. The cubic root of 1621141264 is about 1174.7360237535.

It can be divided in two parts, 16211 and 41264, that added together give a palindrome (57475).

The spelling of 1621141264 in words is "one billion, six hundred twenty-one million, one hundred forty-one thousand, two hundred sixty-four".