1485420781 has 8 divisors (see below), whose sum is σ = 1693783224. Its totient is φ = 1290501120.

The previous prime is 1485420751. The next prime is 1485420787. The reversal of 1485420781 is 1870245841.

It can be written as a sum of positive squares in 4 ways, for example, as 222755625 + 1262665156 = 14925^2 + 35534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1485420781 - 2¹⁷ = 1485289709 is a prime.

It is a super-2 number, since 2×1485420781² = 4412949793253299922, 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 (1485420787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360460 + ... + 3360901.

It is an arithmetic number, because the mean of its divisors is an integer number (211722903).

Almost surely, 2^1485420781 is an apocalyptic number.

It is an amenable number.

1485420781 is a deficient number, since it is larger than the sum of its proper divisors (208362443).

1485420781 is a wasteful number, since it uses less digits than its factorization.

1485420781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721391.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 1485420781 is about 38541.1569753686. The cubic root of 1485420781 is about 1140.9934863106.

The spelling of 1485420781 in words is "one billion, four hundred eighty-five million, four hundred twenty thousand, seven hundred eighty-one".