1461456257 has 4 divisors (see below), whose sum is σ = 1461620160. Its totient is φ = 1461292356.

The previous prime is 1461456253. The next prime is 1461456299. The reversal of 1461456257 is 7526541641.

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: 7526541641 = 79 ⋅95272679.

It is a cyclic number.

It is not a de Polignac number, because 1461456257 - 2² = 1461456253 is a prime.

It is a super-2 number, since 2×1461456257² = 4271708782248900098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1461456251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67757 + ... + 86682.

It is an arithmetic number, because the mean of its divisors is an integer number (365405040).

Almost surely, 2^1461456257 is an apocalyptic number.

It is an amenable number.

1461456257 is a deficient number, since it is larger than the sum of its proper divisors (163903).

1461456257 is an equidigital number, since it uses as much as digits as its factorization.

1461456257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163902.

The product of its digits is 201600, while the sum is 41.

The square root of 1461456257 is about 38228.9975934499. The cubic root of 1461456257 is about 1134.8242483080.

Adding to 1461456257 its reverse (7526541641), we get a palindrome (8987997898).

The spelling of 1461456257 in words is "one billion, four hundred sixty-one million, four hundred fifty-six thousand, two hundred fifty-seven".