15420773 has 2 divisors, whose sum is σ = 15420774. Its totient is φ = 15420772.

The previous prime is 15420719. The next prime is 15420793. The reversal of 15420773 is 37702451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14303524 + 1117249 = 3782^2 + 1057^2 .

It is a cyclic number.

It is not a de Polignac number, because 15420773 - 2¹⁰ = 15419749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15420793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7710386 + 7710387.

It is an arithmetic number, because the mean of its divisors is an integer number (7710387).

Almost surely, 2^15420773 is an apocalyptic number.

It is an amenable number.

15420773 is a deficient number, since it is larger than the sum of its proper divisors (1).

15420773 is an equidigital number, since it uses as much as digits as its factorization.

15420773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 15420773 is about 3926.9292074088. The cubic root of 15420773 is about 248.9060090515.

The spelling of 15420773 in words is "fifteen million, four hundred twenty thousand, seven hundred seventy-three".