1405252477 has 2 divisors, whose sum is σ = 1405252478. Its totient is φ = 1405252476.

The previous prime is 1405252451. The next prime is 1405252481. The reversal of 1405252477 is 7742525041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860776921 + 544475556 = 29339^2 + 23334^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405252477 - 2⁷ = 1405252349 is a prime.

It is a super-2 number, since 2×1405252477² = 3949469048229271058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405252777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702626238 + 702626239.

It is an arithmetic number, because the mean of its divisors is an integer number (702626239).

Almost surely, 2^1405252477 is an apocalyptic number.

It is an amenable number.

1405252477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405252477 is an equidigital number, since it uses as much as digits as its factorization.

1405252477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 37.

The square root of 1405252477 is about 37486.6973338543. The cubic root of 1405252477 is about 1120.0862170555.

The spelling of 1405252477 in words is "one billion, four hundred five million, two hundred fifty-two thousand, four hundred seventy-seven".