1151397405 has 12 divisors (see below), whose sum is σ = 1995755580. Its totient is φ = 614078592.

The previous prime is 1151397371. The next prime is 1151397419. The reversal of 1151397405 is 5047931511.

It is a happy number.

1151397405 is a `hidden beast` number, since 11 + 513 + 97 + 40 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 315204516 + 836192889 = 17754^2 + 28917^2 .

It is not a de Polignac number, because 1151397405 - 2¹⁵ = 1151364637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1151397405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12793260 + ... + 12793349.

It is an arithmetic number, because the mean of its divisors is an integer number (166312965).

Almost surely, 2^1151397405 is an apocalyptic number.

1151397405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151397405 is a deficient number, since it is larger than the sum of its proper divisors (844358175).

1151397405 is a wasteful number, since it uses less digits than its factorization.

1151397405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25586620 (or 25586617 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 1151397405 is about 33932.2472730587. The cubic root of 1151397405 is about 1048.1137427413.

The spelling of 1151397405 in words is "one billion, one hundred fifty-one million, three hundred ninety-seven thousand, four hundred five".