1506662261 has 4 divisors (see below), whose sum is σ = 1622559372. Its totient is φ = 1390765152.

The previous prime is 1506662207. The next prime is 1506662273. The reversal of 1506662261 is 1622666051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1622666051 = 16979 ⋅95569.

It can be written as a sum of positive squares in 2 ways, for example, as 461433361 + 1045228900 = 21481^2 + 32330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1506662261 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 (1506662461) 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, 57948536 + ... + 57948561.

It is an arithmetic number, because the mean of its divisors is an integer number (405639843).

Almost surely, 2^1506662261 is an apocalyptic number.

It is an amenable number.

1506662261 is a deficient number, since it is larger than the sum of its proper divisors (115897111).

1506662261 is a wasteful number, since it uses less digits than its factorization.

1506662261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115897110.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1506662261 is about 38815.7475903788. The cubic root of 1506662261 is about 1146.4064918757.

The spelling of 1506662261 in words is "one billion, five hundred six million, six hundred sixty-two thousand, two hundred sixty-one".