761621 has 4 divisors (see below), whose sum is σ = 870432. Its totient is φ = 652812.

The previous prime is 761611. The next prime is 761623. The reversal of 761621 is 126167.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 126167 = 71 ⋅1777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-761621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54395 + ... + 54408.

It is an arithmetic number, because the mean of its divisors is an integer number (217608).

2⁷⁶¹⁶²¹ is an apocalyptic number.

It is an amenable number.

761621 is a deficient number, since it is larger than the sum of its proper divisors (108811).

761621 is a wasteful number, since it uses less digits than its factorization.

761621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108810.

The product of its digits is 504, while the sum is 23.

The square root of 761621 is about 872.7090007557. The cubic root of 761621 is about 91.3228879075.

Adding to 761621 its reverse (126167), we get a palindrome (887788).

The spelling of 761621 in words is "seven hundred sixty-one thousand, six hundred twenty-one".