145763621 has 8 divisors (see below), whose sum is σ = 148972824. Its totient is φ = 142571520.

The previous prime is 145763617. The next prime is 145763623. The reversal of 145763621 is 126367541.

It can be written as a sum of positive squares in 4 ways, for example, as 14546596 + 131217025 = 3814^2 + 11455^2 .

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 145763621 - 2² = 145763617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145763623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13781 + ... + 21941.

It is an arithmetic number, because the mean of its divisors is an integer number (18621603).

Almost surely, 2^145763621 is an apocalyptic number.

It is an amenable number.

145763621 is a deficient number, since it is larger than the sum of its proper divisors (3209203).

145763621 is an equidigital number, since it uses as much as digits as its factorization.

145763621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8551.

The product of its digits is 30240, while the sum is 35.

The square root of 145763621 is about 12073.2605786507. The cubic root of 145763621 is about 526.2794144052.

The spelling of 145763621 in words is "one hundred forty-five million, seven hundred sixty-three thousand, six hundred twenty-one".