1406255881 has 2 divisors, whose sum is σ = 1406255882. Its totient is φ = 1406255880.

The previous prime is 1406255869. The next prime is 1406255897. The reversal of 1406255881 is 1885526041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720654025 + 685601856 = 26845^2 + 26184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406255881 - 2¹⁵ = 1406223113 is a prime.

It is a super-2 number, since 2×1406255881² = 3955111205694172322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1406255801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703127940 + 703127941.

It is an arithmetic number, because the mean of its divisors is an integer number (703127941).

Almost surely, 2^1406255881 is an apocalyptic number.

It is an amenable number.

1406255881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406255881 is an equidigital number, since it uses as much as digits as its factorization.

1406255881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 1406255881 is about 37500.0784132514. The cubic root of 1406255881 is about 1120.3527484233.

The spelling of 1406255881 in words is "one billion, four hundred six million, two hundred fifty-five thousand, eight hundred eighty-one".